The police, who investigated William Tyrrell's disappearance, placed a Spider-Man suit and a secret camera on a bush track known to be interested in a court in Sydney.
The surveillance strategy was announced on Tuesday before the Downing Center District Court hearing charges against former NSW senior detective Gary Jubelin.
Magistrate Ross Hudson previously rejected an application from the NSW police commissioner to suppress details of covert strategies, surveillance strategies, and broader investigation strategies.
William Tyrrell disappeared from a house in Kendall, NSW in September 2014
Gary Jubelin (right) pleaded not guilty of illegally recording four conversations with interested person Paul Savage in 2017 and 2018 when investigating William's disappearance
The 57-year-old celebrated not guilty of having illegally recorded four conversations with interested person Paul Savage in 2017 and 2018 when he was investigating William's disappearance from a house in Kendall in September 2014.
Prosecutor Philip Hogan said Mr. Savage, who lived on the same street as the city on the north coast, was at home when the three-year-old disappeared in a Spider-Man suit.
On July 26, 2017, the police placed a camera and a Spider-Man suit, similar to the one that William had worn, on the bush track where Mr. Savage is known to walk every day.
They photographed him in the area, but were not sure if he saw the suit that day. He reported it to the police the next day.
"The meaning of this is that it was one of the issues that Mr. Jubelin spoke to him about," said Mr. Hogan.
A watch order and wiretapping orders were sometimes issued for Mr. Savage, but the prosecutor claimed that Jubelin made four secret records that they did not cover.
On July 26, 2017, the police placed a camera and a Spider-Man suit, similar to the one that William had worn, on the bush track where Mr. Savage is known to walk every day
He claimed that Jubelin had instructed another officer to record the first call Jubelin made from the police headquarters over the phone over the speaker.
He reportedly told the officer not to save the record, but the officer put it on the computer system.
Two other calls were made secretly to Mr. Savage on Jubelin's cell phone, but he later asked the officer to make copies of them that indicated they were under the warrants, Mr. Hogan said.
A surveillance order and telephone tapping orders were sometimes issued for Mr. Savage, but the prosecutor alleged that Jubelin made four secret records that they did not cover
Jubelin admitted to having made the calls, but claims "the records were made to protect his legitimate interests," also for operational reasons.
He said Mr. Savage previously complained about aspects of his interview in August 2017, saying the air conditioning was too cold and he had no access to water.
"Mr. Jubelin cannot have a personal interest in a matter arising from a police investigation," said Mr. Hogan.
None of the talks with Mr. Savage were urgent and could have been delayed to organize the warrants, he said.
Jubelin had admitted to making the calls, but "claimed the records were made to protect his legitimate interests," also for operational reasons
Detective Sergeant Laura Beacroft, who was part of the investigation into William's disappearance, said that further investigation into Mr. Savage had taken place after he became a person of interest in March 2017.
This included "numerous strategies designed to evoke a response" by Mr. Savage.
Tracking and listening devices, cameras, and surveillance personnel using handheld devices were used.
"One of the problems was that Mr. Savage had a habit of listening to the radio very loudly," while static was also a problem when making audio recordings, she said.
Jubelin had the idea of putting the Spider-Man suit in the bush, she said.
The hearing continues.
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