Like Murder Like Son

Set in and around Columbus, Ohio and Ohio State, this story constantly twists once Ted and Lewis start freshman year. Lewis, the man about town, pursues Ted's mom. She's OK with that. But her boyfriend isn't. And Ted doesn't know about Lewis and he doesn't approve of the boyfriend.
Lewis's father was murdered recently, and the investigation was -- the boys wonder -- amateurish? They set out to solve the case, but not without getting into more than they bargained for. A lot more.
Each boy gets involved with girls their own ages, too, but that doesn't simplify anything.
Back cover inscription: Two regular guys. Their freshman year, they become best friends.
Their sophomore year, they solve a murder. And commit one.