How Can We Find Out the Her Boyfriend

My question involves a child custody case from the State of Michigan

We are trying to find out the name of the man who is currently living with our four-year-old grandson and his mother. Our son has full custody but, has court arrangements to allow her to see him on the weekends. Unfortunately, she is living is a very dangerous area in the city of Detroit and is currently 8 months pregnant with her third child in 3 years from a third man.:grumpy:

We are desperately trying to find out who the man is that she is currently living with due to the following reasons:

• He has made several threats to our son (our grandson's father) via phone and text messages (which we have shared with the police) yet they said that they can't do anything until he actually tries something first????
• His mother has told us that they both don't have jobs. Then, suddenly have thousands of dollars to spend.
• They live in a VERY dangerous area of Detroit (the Eastside- Kerchavel)
• He has made threats to bring his "Posey" of 40 deep thugs out to the suburbs and "kick our pampered a...es"
• He has threatened to whip our grandson "...whenever he gets ready"
• Our grandson has displayed very bad behaviour. Spitting and Bitting whenever he comes from staying with her over the weekend.
• She has admitted to leaving our grandson with him alone on several occassions.

PLEASE! ANY HELP would be greatly appreciated!! :confused::(

Thank you

How Can We Find Out the Her Boyfriend