To ask if you would date someone with a close friend in jail?

[finderskeepers7]

Asking on behalf of my cousin who's asked for my advice. She's started dating someone new and has recently discovered he has a friend in prison (the crime is unknown) who calls him regularly. She's taken this as a massive red flag as she believes 'you are the company you keep'

I've said you can't really judge someone based on what their friend has done. So, would you date someone who had a close friend in prison?

A relation of mine is in prison; without being too specific, will be on the SOR for 10 years after his release.
For the sake of my wider family, particularly his mother, I will remain cordial.
This says nothing about me, or the company I keep whatsoever.