Sudbury Police Department, File, Associated Press
FILE - This Wednesday, Oct. 21, 2009, file booking photo provided by the Sudbury, Mass., Police Dept. shows Tarek Mehanna, of Sudbury, after he was arrested and charged with conspiring to plot terror attacks. A federal jury in Boston completed its first full day of deliberations during his trial Monday, Dec. 19, 2011 without reaching a verdict. Deliberations continue Tuesday.

BOSTON — A Massachusetts man was convicted Tuesday of conspiring to help al-Qaida and plotting to kill U.S. soldiers in Iraq.

Tarek Mehanna, 24, of Sudbury, faced four terror-related charges and three charges of lying to authorities. A federal jury convicted him Tuesday of all counts.

Prosecutors said Mehanna and two friends conspired to travel to Yemen so they could receive training at a terrorism camp and eventually go on to Iraq to fight and kill U.S. soldiers there.

When the men were unable to find such a training camp, Mehanna returned home and began to see himself as part of the al-Qaida "media wing," translating materials promoting violent jihad and distributing them over the Internet, prosecutors said.

Mehanna will be sentenced April 12 and could be sent to prison for the rest of his life. His mother, Souad Mehanna, sobbed after the verdict was read and was consoled by her younger son, Tamer. Mehanna's lawyers also cried.

The defense lawyers portrayed Mehanna as an aspiring scholar of Islam who traveled to Yemen to look for religious schools, not to get terrorist training. They said his translation and distribution of controversial publications was free speech protected by the First Amendment.

Prosecutors focused on hundreds of online chats on Mehanna's computer in which they said he and his friends talked about their desire to participate in jihad, or holy war. Several of those friends were called by prosecutors to testify against Mehanna, including one man who said he, Mehanna and a third friend tried to get terrorism training in Yemen so they could fight American soldiers in Iraq.

Mehanna's lawyers told jurors that prosecutors were using scare tactics by portraying Mehanna as a would-be terrorist and were trying to punish him for his beliefs.

The defense built its case on the testimony of a half dozen terrorism experts. Mehanna did not testify.

His lawyers acknowledged that Mehanna expressed admiration for Osama bin Laden, but said he disagreed with bin Laden and other al-Qaida leaders about many things, including the use of suicide bombers and the killing of civilians.

Jurors began deliberating Friday. In his instructions to them, U.S. District Judge George O'Toole Jr. told jurors that in order to find Mehanna guilty of conspiracy to provide material support to al-Qaida, they must find that he worked "in coordination with or at the direction of" the terrorist organization. He said independent advocacy on behalf of the organization is not a violation of the law.