I don’t have many friends. The few I have I like a lot, and would go to great lengths to help them. If one of my friends asked me to write a letter to a judge. Even if I knew they did it. I’d write that letter. I would do and have done far crazier, and morally dubious thangs than that to help or protect a friend.
What about if your friend raped children? Would you still be ok with that? Or are you only OK with it if they rape adults? Just trying to work out exactly where people like you draw the line.
PS: You didn’t need to include the part about not having many friends, it’s heavily implied by the rest of your comment.