MONTGOMERY, Ala. (WSFA) – A Montgomery man pleaded guilty to federal robbery and firearms charges Friday, according to the U.S. Department of Justice. According to his plea agreement, Jalen Lamarcus Gunn, 21, committed two armed robberies in Montgomery last April. The first was on Apr. 27, robbing a convenience store on Wares Ferry Road at gunpoint and making off with about $3,000. The second was two days later on Apr. 29 when he robbed a convenience store on Perry Hill Road at gunpoint and made off with about $2,500 and cigarettes.