Gang members and ex-policeman who claimed Christian Poveda was an informer jailed for between four and 30 yearsA court in El Salvador has convicted 10 gang members and a former policeman for killing a Franco-Spanish photojournalist who made an internationally acclaimed documentary about them.Christian Poveda initially gained the trust of a notorious gang known as Mara 18 in La Campanera, a tough slum in the capital, San Salvador, but in September 2009 was ambushed and shot four times in the head.The death shocked the central American country, which has one of the world's highest homicide rates.Earlier this week a court sentenced Luis Vasquez and Josa Alejandro Melara to 30 years for planning the murder and two others to 20 years for pulling the trigger and acting as a lookout.