for what crimes would you turn in a loved one

Nothing.

I would have included election tampering, witness bribery, gay bashing and animal abuse.

And I’m appalled that there are significant numbers of people who wouldn’t turn in someone for serious crimes like child rape or serial murders.

Well let me clarify my case. I don’t have any loved ones who could be capable of those things. If they did them, it would mean they were having a major brain malfunction or some similar crisis and I would make sure they got the help they needed, or some kind of isolation, rather than letting the police push them through the legal system into a hellish future of incarceration.