Brent Houdeshell will be sentenced at a later date.
A third suspect has been charged with aggravated robbery in the case.
Devonte Brown was just 16 when he broke into the home of Joscelyn Jones, 16, raped and stabbed her to death.
Eric Mathis arraigned in Toledo Municipal Court for murder charge.
Sean O'Connell is facing multiple charges, including tampering with evidence, coercion, dereliction of duty, and obstructing official business.