A $50,000 reward, hundreds of interviews and thousands of hours of investigation.
Still, 25 years after the murder of 17-year-old Cindy Halliday, her killer has not been caught.
Cindy vanished on April 20, 1992 - Easter Monday that year - and was reported missing to police by her mother the next day.
The teen had gone to downtown Barrie on that Easter weekend to visit a friend and was last seen by witnesses getting into a car at a Hasty Market in Midhurst on the way home to Waverley.
Detectives from OPP Central Region still work the case which is considered 'open.'
"Investigators continue to follow-up on leads," said Staff Sgt. Rob Lake.
Two months after she disappeared and following a large-scale search, Cindy's skeletal remains were found on June 16, 1992 in a reforestation area off Horseshoe Valley Rd. in Flos Township near Elmvale.
Police say the investigation indicates she died in April or May of 1992 as a result of foul play.
As with many so-called cold cases, police review old exhibits in the hope modern science might eventually catch up with a killer and give detectives that big break.
Cindy's case is no different.
"Evidence in this case is evaluated on a continual basis and in relation to advances in forensic testing," said Lake.
Police say the teen was a frequent hitchhiker, often travelling between her home in Waverley to Elmvale, Midland and Barrie.
She is survived by her mother, siblings and many other family members and friends who still want answers to the question: Who killed Cindy?
It's never too late to come forward with any information, police say, that might help Cindy's family get those answers - even after 25 years.
"The public can play a significant role in this investigation. Any person who has information related to Cindy’s case is encouraged to contact the police or Crime Stoppers," said Lake.
"No matter how small or insignificant the person feels the information is they are encouraged to contact the police."
Anyone with information is asked to call the OPP at 1-888-310-1122 or Crime Stoppers.
