Alleged prostitute Alisha Walker guilty of 2nd degree murder in teacher's killing

CHICAGO (WLS) -- A jury found an alleged prostitute guilty of second-degree murder in the killing a Brother Rice High School teacher.

Prosecutors said Alisha Walker, 22, killed Al Filan, 61, at his home in south suburban Orland Park two years ago, during an argument in which he demanded unprotected sex.

Filan was a long-time teacher at the Catholic high school on Chicago's South Side.

Walker can be sentenced to probation or 4-20 years in prison.