The phrase "suspected gunman" refers to a person who is believed to be involved in a shooting or carrying a weapon, but their guilt has not been proven yet. Full definition
Jugul also said several persons have been ambushed and killed by suspected gunmen in the last one week and no arrest has been made. (nigeriapoliticsonline.com)
His body was found at a rubber plantation in Okurekpo community after he was abducted by suspected gunmen sometime in march. (dailypost.ng)
Gonzalez also slammed Trump for a recent tweet that some perceived as placing blame on former classmates of suspected gunman Nikolas Cruz for not contacting authorities. (businessinsider.com)