Best Detectives Delhi Established in 1998 by an ex. Army officer from Indian Army, Best Detectives Delhi is a highly respected investigation Agency Delhi working India and worldwide. Our clients are from corporate, private and governmental origins. Our services include provision of surveillance operatives, covert cameras, background investigations, tracking, counter surveillance, tracing and investigative training. If you are looking out for a private detective you have come to the right place at Best Detectives Delhi! Here you will find a huge database and information on some of the best detectives in Delhi today. Our Best detectives are equipped with all the tools required to solve cases. We have finger print experts, lie detectors.