rdale said:
He was not arrested for having a scanner in his car, he would have been arrested for impersonating an officer.
He likely was arrested for BOTH impersonating and possession of a scanner while commiting a crime. So to answer the original question, NO the scanner charge will not likely be dismissed, as it is in line with state law.
See MCL 750.508 for further, which in part states the following
"(2) A person shall not carry or have in his or her possession in the commission or attempted commission of a crime a radio receiving set that will receive signals sent on a frequency assigned by the federal communications commission of the United States for police or other law enforcement, fire fighting, emergency medical, federal, state, or local corrections, or homeland security purposes. "