MUNICH - A German man of Afghan descent went on trial on Tuesday charged with being a member of a terrorist organization and an accomplice to murder in Syria after participating in a jihadist attack on a prison in Aleppo.Munich court spokeswoman Andrea Titz said the German-born man, aged 27 and identified only as Harun P., could face a life sentence if convicted at the trial, which is expected to run until April 23."He was active in an Islamic terror group from October 2013 to April 2014 and trained to fight. He grew up in Germany and was radicalized only in recent years before going to Syria," Titz said.A lawyer for Harun P. described a troubled life in Germany marred by depression and substance abuse, local media reported. He dropped out of three job training programs.Thousands of Western volunteers have traveled to Syria and Iraq to join militant groups. The trend has raised fears in Europe and the United States of attacks by returning fighters.