The suspect wanted in a recent ambush on an ICE facility is a long-time Antifa member, connected to several left-wing militant groups.

The FBI and Texas DPS are asking for the public's help in the search for Benjamin Song, accused of shooting an officer in the Alvarado ICE attack.

Authorities are searching for Song in connection with an attack outside a U.S. Immigrations and Customs Enforcement detention facility in Texas on July 4.