The brother of a man who was gunned down outside Arms Apartments last month has been charged with a drive-by shooting.The suspect, Roman Patrick Couillard, 26, has been charged with aggravated assault with a fire-arm and reckless endangerment with a firearm. He will face those charges along with charges of disorderly conduct he received the night of his brother’s shooting.Couillard’s brother, Rufino “Junior” Soto, 28, was fatally wounded Sept. 4 outside Arms Apartments during an altercation with Herbert Conley, 51. Accounts vary widely with those who side with the victim saying Conley was looking for trouble and gunned down Soto in cold blood.