09/09/2011 02:31 EDT | Updated 11/09/2011 05:12 EST

York police appeal for help in latest homicide

York Regional Police released a picture of an elderly homicide victim Friday, in hopes of gaining new leads in the area's latest homicide.

Earlier this week police identified remains found last month in a field in Aurora, Ont. as those of 67-year-old Peter Gavin of East Gwillimbury, but did not say how he died.

Police originally suspected foul play, and on Friday upgraded the case to homicide.

Gavin, a retired Canadian National Railway worker, farmer and a 40-year resident of the Town of East Gwillimbury, was reported missing from his home at Kennedy and Ravenshoe roads on Aug. 24 and three days later a citizen discovered human remains in the Warden Avenue and St. John's Sideroad area.

It is believed that Gavin had been missing for approximately two months prior to the missing persons report.

"Investigators hope that the image being released will assist in generating witnesses who may have seen the victim prior to his death," police said in a release.