The Neill Group provides a range of private investigation services across New Zealand from Kaitaia to Bluff. The Neill Group suggests clients employ private investigators who are members of the World Association of Detectives or New Zealand Institute of Professional Investigators.

From complex fraud and employee theft to suspected infidelity (cheating partners) and other sensitive personal matters, Dion Neill and his team of highly qualified and experienced government licensed private investigators have provided the facts and given clients peace of mind for over three decades!

Personal Investigations

Are you are going through a hostile separation? Searching for a birth parent, sibling or lost family member? We can help with support from our network of high-caliber licensed private investigators in the greater Wellington region and throughout New Zealand.

Is your partner being unfaithful? Do you suspect there’s something not right in your relationship? If you feel you are being cheated on, you are probably correct. Don’t make life changing decisions without knowing the facts. Employing a licensed private investigator will provide you with the answers you are seeking. We will take the time to discuss your situation with you, our decades of experience allows us to identify the “red flags”.

We can help you decide if employing a licensed private investigator is the best option for you. If required, we can utilise a covert female operative to test the commitment of your partner, we refer to this test as a “honey trap”, this is a covert ‘peace of mind’ operation that provides a high degree of success.

Child & Youth Investigations 

We use recognised best practice for covert surveillance to determine what happens when a parent or caregiver is with their child. We document any signs of abuse or neglect that is observed and gather evidence that may prove a child is being abused. We can confirm if a parent or caregiver engages in criminal activity, neglect, or other activities that would directly affect a child’s welfare. Based on the evidence gathered, parents and the courts can determine what to do to ensure the child’s safety.

Insurance Investigations 

Dion Neill was one of the first licensed private investigators in New Zealand to carry out investigation assignments for the Accident Compensation Corporation (ACC).

Dion works closely with a number of major New Zealand and international insurance firms to confirm the validity of injury and disability related insurance claims. Injury and disability insurance claims can amount to substantial amounts of money which sometimes requires validation prior to any compensation or payment being made to ensure the entitlement is correct.

Fraud & Theft Investigations

Dion has decades of experience investigating complex fraud and workplace theft matters for commercial clients, government agencies and private individuals.

Fraud is a worldwide concern with an estimated cost to New Zealand business and government agencies estimated at $6 billion a year. Fraud occurs in any business no matter its size or stature. Fraud inside a business or organisation frequently occurs through poor internal controls and processes, this allows a window of opportunity for people in positions of trust and responsibility to carry out offending such as theft or fraud.

We know fraud can damage a company or organisations reputation, brand and culture. Workplace theft is on the increase! Finding the individuals responsible for a theft is only the first step; putting in place the remedial processes and policies following the incident is our ongoing commitment to protecting your long term interests.

Alcohol, Drug & Substance Abuse Investigations 

Do you suspect your family member, partner or employee maybe using excessive alcohol, drugs or illegal substances? Did you know that if drugs are used on your property, you can also be prosecuted for their criminal activity.

Alcohol and drug abuse is known to be the source of criminal activity and the foundation of anti-social behaviour. Our alcohol, drug and illegal substance investigations will help to provide the answers you are seeking.

Physical or Psychological Abuse Investigations 

Is someone in your life a possible victim of physical or psychological abuse? Licensed private investigators can provide evidence to help protect you and your loved ones. The factual evidence provided by private investigators are often used for the basis of a complaint to police or for legal purposes.

Covert Surveillance 

It is important for everyone to understand that surveillance is both legal and ethical. We only conduct surveillance for legitimate purposes and in accordance with legal requirements. Surveillance is a powerful tool used in investigations where evidence is obtained in order to secure prosecutions – substantial intelligence is often gained from these operations.

The current measures of surveillance and intelligence gathering include insurance claimant surveillance, domestic related surveillance and surveillance for theft or fraud related investigations.

Technical Surveillance Counter Measures (TSCM)

Our contracted specialist can detect hidden cameras and listening devices often referred to as “bugs”. Our specialist can locate hidden cameras, tracking devices and spyware. The law forbids the use of hidden cameras and recording devices without an individuals consent. It is a clear breach of privacy when an individual places surveillance on another individual without their consent.

People install hidden cameras and listening devices for a variety of reasons, in some cases to gather evidence of a cheating partner or to gather sensitive personal information, competitors secrets, business plans, designs or financial information. If you have any concerns in this area, we will refer to our preferred specialist for assistance.

Formal Interviewing

Formal interviews can be conducted to support civil, criminal or personal investigations. Our interview process includes the format used by the police and other law enforcement agencies based on PEACE, cognitive and the Reid interview techniques. Formal interviews can be recorded if requested and consent is obtained by the parties involved.

Audits & Reviews 

The Neill Group conducts nationwide mystery customer programmes designed for the commercial and retail sectors. We covertly audit the communication, compliance and integrity of your customer services people. Covert visits to your business are known to uncover potential areas of loss and identify risk to your business.


We have a forensic expert available to investigate a wide range of cyber-crimes including online fraud, stalking and harassment. Our I.T. forensic expert we can assist with revealing the true identity of anonymous blogs, fake websites, Facebook profiles, email communication, website ownership, IP addresses and the forensic recovery of information.

Loss Prevention

The handling of product and stock – both in retail and distribution – generally operates with an acceptable shrinkage percentage to allow for losses incurred through internal and external factors such as damage, breakages, faults and theft.

Often, many of these losses are caused by data entry or coding errors, and can be reduced through the introduction of improved internal processes. Once stock is accurately accounted for, the true extent of fraud or theft can be established.

Hidden Cameras 

Modern technology has allowed covert cameras to almost be undetectable. Our technical surveillance expert uses the latest in technology covert cameras to detect criminal offending and provide evidence in criminal matters. Covert cameras provide quality footage to expose what is happening inside your business or your residence.

Undercover Operations

We have access to a highly trained undercover agent who has years of experience within the intelligence field. Our agents is commonly used inside a business premises to detect theft, fraud, unexplained loss and to prove criminal offending.

Undercover operations successfully reveal activities including the use of alcohol, drugs and in some cases, workplace bullying. Our undercover agent supports our investigators to gather evidence that can be used for a criminal prosecution or to assist with civil litigation.

Criminal Defence Assignments 

While all criminal cases do not require the services of a licensed private investigator, in cases that do, the use of a licensed private investigator often becomes one of the most important members of the legal defence team.

A licensed private investigator employed by the defence team performs specific tasks in order to prepare an effective defence against criminal charges. A licensed private investigator will review the police investigation and if required, interview witnesses to discover if there are changes in their statements and to establish any new leads of inquiry.

Background Checks

Thanks to modern technology, a discreet background check allows us to find out about someone quickly before we give them the opportunity to be in a position of trust or to potentially harm us.

A comprehensive background check will reveal a person’s driving record, credit history, education and with their consent, criminal history. Employers routinely carry out background checks and screen prospective employees, you should do the same in your business and personal life.

If you have any doubts or concerns, before you make a personal or business commitment, consider a discreet background check by a private investigator. While some people believe it’s easy to search a person’s name on the internet to find out more about them, that is simply not enough.

Methamphetamine Testing 

We call on an expert methamphetamine testing agency to assist us in detecting methamphetamine (meth), commonly referred to as ‘P’.

Our associates provide mobile independent methamphetamine testing in the greater Wellington region and throughout New Zealand for real estate agents, landlords, commercial property owners, vehicle rental companies or private individuals who need positive assurance their property has not been used for the manufacture of methamphetamine.

Identity Verification

Are you looking for a relationship online? A search to connect with someone for a relationship can make you vulnerable and as a result, these emotions are often used by offenders to access your private life including your bank account, assets and personal property.Internet or online dating has changed the way people meet, no longer are face to face meetings necessary to kindle a relationship.

What happens if the person behind the computer screen is not the person they say they are? Online dating scams and internet based fraud is now very common and rapidly growing, anyone can be targeted.

Consult with a licensed private investigator before you make any important business or personal relationship decisions.

Pre-Employment Screening

High staff turnover, unsuitable employees and dishonest staff can ultimately cost your company or organisation thousands of dollars in time, money and resources. That’s why it’s important you recruit the right person from the very beginning.

While it is likely that your candidates are presenting themselves honestly, a simple background check by a licensed private investigator will assist you to identify any possible history of dishonesty or pattern of behaviour that is not aligned with your best interests.

Skip Tracing

Attempting to locate birth parents, siblings, debtors, witnesses or defendant? We will assist you to find the missing pieces – we know the internet is a useful tool for locating people, but, it often provides incorrect or historic information, employing a licensed private investigator will often open new avenues of inquiry that may lead to a positive result.

We work closely with legal firms, enforcement agencies, financial institutions and private individuals who are seeking to locate a person of interest. We provide a professional tracing service that utilises proven information sources, confidential informants and effective tracing tools to assist in tracing anyone within New Zealand or worldwide.

Trade Mark & I.P. Infringements 

We are often instructed by legal firms to investigate infringements of branding, international copyright and trade mark patents along with the unauthorised use of logos and theft of intellectual property.

Dion has personally carried out extensive trade mark and intellectual property investigations for some of the world’s leading brands, including: Adidas, Armani, Microsoft, Nike, Playboy and Sony PlayStation along with official worldwide licence holders of sports merchandise and movie memorabilia. The evidence provided by Dion has been used for a number of prosecutions.

As a result of Dion’s investigations, legal process were also served on the individuals concerned and the counterfeit products were destroyed under a court order.

New Zealand & Worldwide 

The Neill Group are based in Wellington with a strategic nationwide network of contracted licensed private investigators, security specialists, field agents, repossession agents and legal process servers (document servers) in every district and region of New Zealand, including: Northland, Whangarei, Auckland, Wellsford, Warkworth, Orewa, Albany, Takapuna, Mangere, Manurewa, Pukekohe, Coromandel Peninsular, Thames, Waihi, Whangamata, Whitianga, Waikato, Hamilton, Te Awamutu, Cambridge, Huntly, Morrinsville, Matamata, Putaruru, Tokoroa, Otorohanga, King Country, Taumarunui, Te Kuiti, Waitomo, Bay of Plenty, Tauranga, Te Puke, Whakatane, Kawerau, Opotiki, Rotorua, Taupo, Turangi, Murupara, East Cape, Gisborne, Tolaga Bay, Tokomaru Bay, Ruatoria, Te Kaha, Taranaki, Wanganui, New Plymouth, Stratford, Hawera, Waitara, Inglewood, Manawatu, National Park, Waiouru, Taihape, Palmerston North, Marton, Bulls, Feilding, Ashhurst, Foxton, Horowhenua, Levin, Otaki, Kapiti, Waikanae, Paraparaumu, Paekakariki, Wellington, Plimmerton, Porirua, Tawa, Johnsonville, Upper Hutt, Lower Hutt, Wainuiomata, Hawkes Bay, Wairoa, Napier, Hastings, Havelock, Waipukurau, Dannevirke, Wairarapa: Featherston, Pahiatua, Masterton, Carterton, Greytown, Tasman, Nelson, Blenheim, Picton, Motueka, West Coast, Westport, Greymouth, Hokitika, Wanaka, Queenstown, Twizel, Alexander, Te Anau, Canterbury, Christchurch, Kaikoura, Ashburton, Southland, Timaru, Oamaru, Dunedin, Invercargill, Balclutha, Mossburn, Gore.