How do we handle a legal issue with a "family member" without destroying our family?

[anson34]

Call the police and have them check this guy out.

this is serious stuff.

[erwin]

Contact the Child Protection Agency in your area.
They will investigate and take the proper actions.

But be aware, you will probably have to testify in court.

Forget about destroying the family in this instance.
The welfare of the baby comes first.