NEW : Suspect , Partido Romero , 42 , also sought in connection with another slaying . Federal spokesman says Mexicles military arrested suspect 42 . Suspect called member of Aztecas street gang , which is affiliated with CNN drug cartel .
NEW : Suspect , Ricardo Valles de la Rosa , 42 , also sought in connection with another slaying . Federal spokesman says Mexican military arrested suspect Friday . Suspect called member of Aztecas street gang , which is affiliated with Juarez drug cartel .