Former William Tyrrell Investigator In Court After Being Stood Down

High-profile NSW police detective Gary Jubelin is due to face a Sydney court over allegations he conducted illegal surveillance.

Jubelin was the lead investigator in the fresh search for three-year-old William Tyrrell until taken off the case earlier this year during misconduct investigations.

Jubelin's lawyer Margaret Cunneen has said her client denies "any wrongdoing whatsoever and will strongly defend the charges against him".

Gary Jubelin
Jubelin denies any wrongdoing. Photo: AAP Photos.

NSW Police in June charged the detective chief inspector with four offences under the surveillance devices act.

The professional standards investigation began after multiple complaints and was overseen by the Law Enforcement Conduct Commission, police say.

The allegations relate to recordings made at undisclosed locations in Parramatta and Kendall, the mid-north coast town where three-year-old William vanished in 2014.

Missing child William Tyrrell. Photo: Supplied.

In addition to leading the fresh search for William, Jubelin was involved in investigating the death of Sydney man Matthew Leveson and the disappearance of three Aboriginal children -- Evelyn Greenup, Clinton Speedy-Duroux and Colleen Walker -- in Bowraville in the 1990s.