Two Trenton residents were charged with murder in the killing of a man who was found fatally shot in a crashed vehicle last month in New Jersey’s capital city, authorities said Thursday. Quashawn Hightower, 23, and Desire Knighton, 21, also face counts of attempted murder, conspiracy to commit murder, aggravated assault and weapons offenses in the shooting that killed Shimon Nesmith Jr. and wounded a woman, according to Mercer County Prosecutor Angelo J. Onofri. Nesmith, 19, of Trenton, was found in a vehicle that crashed into a building on the 900 block of Martin Luther King Jr. Boulevard aro…