Re: What would you do?
Assuming its my mother/father/husband/future child/best friend, the ONLY time I would turn them in is if the crime involves child abuse. Otherwise, I would just make sure they (and I) have the number of a GOOD criminal defense lawyer on speed dial, and that they’re aware of their legal rights in the event of an arrest.
As for how my opinion would change…it depends on the specific crime and details of the crime. For example, in the event of a murder…it would depend on the circumstances. Did they murder just for joy? Was it an accident? Or did they do it out of revenge?