Sorry that's not correct. It's the party alleging the crime that must prove it, or at least try to do so. That's why there is a defence part of the trial, otherwise the case would go to the jury after the commonwealth rests.
It's not sufficient for Joe Bloggs to stand up and say the bogeyman did it. They have to show some evidence, which is why third part culprit was denied pre-trial for one individual.
35.45
Sorry but it is correct