Check out the bill's sponsors:
"The chief sponsor of the bill in the state senate was Shirley Johnson (R-Royal Oak) while Bill Bullard (R-Highland Township) was a cosponsor. In the state House, Nancy Cassis (R-Novi) was among 20 sponsors."
I suppose we'll have to count them among the "marxist friends".
Gorcyca cited drug conspiracy cases as those where witnesses are frequently in danger unless their identity is kept private during the investigation.