Toronto Police are looking for a name to match DNA in a cold case murder.

Margaret McDonald was found dead in her 36 Lascelles Boulevard home, in the Yonge Street and Davisville Avenue area, on June 24, 1994. She’d been sexually assaulted, bludgeoned, and her throat was slashed.

Although police gathered fingerprints and DNA, the case went cold. Now they’re turning to social media in hopes of identifying McDonald’s killer.

Police say forensic phenotyping has narrowed the suspect down to a man of European descent, likely with dark hair and blue or intermediate coloured eyes. He would have been between 20 and 30 years old at the time of the murder, and would be between 40 and 50 years old now. He likely lived in the same general area as McDonald, and may have known she lived alone.

Police also say the suspect likely had trouble having or maintaining intimate relationships with women at the time.

Who killed Margaret McDONALD? #TPSCold Case. Homicde 26/1994. We have the killer's DNA. Info required, pls RT pic.twitter.com/btN0hRlRvI — Homicide Squad (@TPSHomicide) April 4, 2016

“There’s no doubt that there are people close with the offender, or were close to him at the time of the event,” Detective Sergeant Stacy Gallant explained. “You know that he did this, I am confident of that. If you want to remain anonymous, that’s perfectly fine. We have his DNA, so all we need from you is his name, nothing more.”

A $50,000 reward has been authorized for information that leads to an arrest and conviction of the person responsible for the murder.