This was merely stop[chase down] and frisk?
According to Kelly and Hannity in disguise guests he was seen making a drug deal, he ran one way and other guy the other way. He also apparently was a very good snitch and well known to cops covering the beat which is known for drug dealing. Very long rap sheet. And apparently a University - I think Maryland U - did drug testing and was positive for heroin and pot.
Also was known for acting up when arrested.