SALEM – Heroin distribution charges against two Lynn men were dropped Wednesday after a judge determined the stop and search of a vehicle was illegal.Gabriel Mora, 19, of 8 Etna Place, and Peter Chear, 23, of 40A Neptune St., both of Lynn, were charged with trafficking over 14 grams of heroin in connection with their arrest on Dec. 14, 2009.Defense lawyers Raymond D. Buso and David Grimaldi challenged the search and seizure of the heroin found in a vehicle during the preliminary trial motion.In Salem Superior Court Wednesday morning, Assistant District Attorney A.J. Camelio said he was dropping the charges against the men because of a ruling by Judge David A. Lowy and that the commonwealth would not be appealing Lowy’s decision to a higher court.Around 7:40 p.m. on Dec. 14 police stopped the men on South Common Street and discovered 20 grams of heroin inside the vehicle.Mora, the driver, provided police with a fake name at the time and had $1,912 in cash that was recovered during a pat frisk. Chear was reportedly carrying $6,106 in cash. Authorities believed the cash was proceeds from drug sales.An Essex County grand jury indicted the pair last February.