() Questions remain about Elias Rodriguez, the man who allegedly shot and killed two Israeli Embassy employees in Washington, D.C., but Rodriguez’s background and several signals may have manifested his beliefs.

Rodriguez, whose father is an Iraq War veteran, allegedly shouted “Free Palestine” as he was led away after his arrest and told police that he was the one who “did it,” according to documents.

Rodriguez has been linked to the Answer Coalition, a left-wing group that devotes itself to ending war and racism. The Answer Coalition has also been responsible for promoting pro-Palestinian protests as recently as last month.

In 2017, Rodriguez was a part of the Answer Coalition, which protested a possible new Amazon hub in Chicago.

The Answer Coalition promoted a GoFundMe for Rodriguez in 2017 to travel to Washington, D.C., to attend the People’s Congress of Resistance, with the goal of putting an end to imperialist war.

Rodriguez also had a brief association with the Party for Socialism and Liberation. He was quoted by the organization in various publications.

The FBI says they are looking into a possible manifesto and possible radical writings that Rodriguez made.