Matthew Rose in EE went down for the manslaughter of Saskia Tate - he had seen Steve Owen kill her to save his own (Steve's) life and then been pressurised into helping bury the body.
Janine Butcher was held on remand while awaiting trial for Laura Beale's murder. Laura died in an accident.
Paul Robinson in Neighbours went to prison for the Lassiter's fire this year, it was actually caused by Jakka Hills.
Corrie loves this trope, as well as Deidre we have (and I don't think this is even all of them!):
Gail went to prison for the murder of husband number 3(4?) Joe McIntyre - he died in an accident while attempting to pull a "Canoe Man" type insurance con.
Tyrone I spent some time inside for battering Kirsty. Of course. she was actually abusing him.
Fiz was convicted of 3 murders and sentenced to life imprisonment. Real killer, John Stape confessed and Fiz was eventually freed.
Maria was held on remand for the murder of Caz in the last few months. Caz wasn't even dead and there was no evidence that she was.
I'm not sure if it counts, but the Weatherfield Police are happy that Tony (Jason's dad) killed Calum and closed the investigation into his death - the actual killer was the now deceased Kylie.