FBI agents could be seen walking in and out of the man's presumed apartment in the 4700 block of North Troy Street.

Rodriguez’s charges were laid out in a criminal complaint. He was informed by U.S. Magistrate Judge Matthew Sharbaugh during an initial appearance in federal court Thursday that some of the charges against him carry the possibility of the death penalty or life in prison, officials said in the briefing later that afternoon.

Two staffers of Israel's Embassy in Washington, D.C., were shot dead outside the Capital Jewish Museum on Wednesday night. Follow live updates.

Elias Rodriguez, the alleged gunman who killed two Israeli Embassy staffers outside the Capital Jewish Museum, has ties to the Party for Socialism and Liberation.