Ashley Brent Crawford was convicted in 2001 in the 1997 death of Nancy Filmore. (OPP)

A convicted killer who walked out of a minimum-security prison over the weekend has been arrested in Toronto, the Ontario Provincial Police said.

Ashley Brent Crawford, 30, had been missing since he left Beaver Creek Correctional Institution in Gravenhurst, Ont., on an unescorted day pass over the weekend.

OPP said Toronto Police found Crawford at a rooming house while investigating another incident. He was arrested on Monday night without incident.

Crawford was convicted of first-degree murder and is serving a life sentence with no chance of parole for 10 years in the death of Nancy Filmore.

His case was intertwined with the bizarre case of Cherylle Dell of Killaloe, Ont., who was convicted in Feb. 2001 of killing her estranged husband Scott Dell in 1995.

A court found Cherylle Dell had killed her husband by tricking him into drinking wine mixed with antifreeze.

Filmore, a jilted lover of Cherylle Dell, had tipped off police to Dell's role in her husband's death. Two years later, Filmore was killed in a house fire in Killaloe.

The courts heard that Cherylle Dell had seduced Crawford, then 19, and talked him into setting Filmore's house ablaze.