The search operation for four months ended with human remains found in a mineshaft being formally identified as those of missing teen, Cayleb Hough.

Hough went missing in December 2015. The remnants of his body were found near Seery Track, Leederderg State Park on March 10. Though the body remains are officially identified, Victorian police are still treating the death as suspicious. The 17-year-old teen lived in the southeast Melbourne suburb of Chelsea Heights. He was last seen close to the Highett suburb on December 20 while driving a car with another man.

Bay939 reported that police found the teen’s blue Ford Falcon sedan in the car park area of an entertainment complex of Melbourne in the middle of January. Missing Persons Squad Detective Senior Sergeant Craig Rhodes has requested the public to cooperate as police continue to inspect the area where the human remains were recovered.  “We are particularly keen to speak to anyone who may have seen any suspicious activity in the Lerderderg State Park since December 20 last year,” Rhodes said on Tuesday as quoted by 9News.

“Someone out there knows who is responsible for Cayleb’s death and we are appealing for them to come forward. Cayleb’s family deserve some answers in relation to this horrific tragedy.”

Victorian police have brought into focus the type of clothing Hough wore when he went missing. He wore a dark jacket, white Nike runners, and khaki shorts.  The officers claimed that the teen neither used mobile phones nor social networking websites after December 20. It was also confirmed that Hough did not access his bank account since then.

Following the recovery of the car suspected to be driven by Cayleb Hough before he went missing, the missing person’s father, Steve Hough, told authorities that his son would never go anywhere without informing the family members. “For him to miss a significant event like family Christmas –straight away a concern was raised,” Hough’s father said.