The FBI is searching for a military veteran suspected of being involved in what authorities are calling an ambush on officers at an ICE detention facility in Texas on the Fourth of July. 

Benjamin Hanil Song, 32, of Dallas, is now the 12th suspect believed to be involved in last Friday’s ambush at Prairieland Detention Center in Alvarado, Texas.

Song, a former U.S. Marine Corps reservist, is accused of firing two AR-15 style rifles at two correctional officers and one Alvarado police officer, according to a criminal complaint obtained by Fox News Digital.

Song is charged with three counts of attempted murder of a federal officer and three counts of discharging a firearm in furtherance of a crime of violence. 

Investigators recovered additional firearms – including another AR-15 style rifle – while searching residences and vehicles. 

Ten assailants are accused of fleeing from the detention center but were apprehended by additional responding law enforcement officers. Song was not located by law enforcement officers, according to the complaint. 

Surveillance footage believed to show Benjamin Hanil Song.  (DOJ)

The complaint alleges that a white Mercedes-Benz registered to a relative of Song was found two days later in the same block as one of the other assailant’s residences. 

Song is now wanted by the FBI and is considered armed and dangerous. The FBI is offering a $25,000 reward for information leading to his arrest and conviction. 

The ten others charged in the attack are: Cameron Arnold, Savanna Batten, Nathan Baumann, Zachary Evetts, Joy Gibson, Bradford Morris, Maricela Rueda, Seth Sikes, Elizabeth Soto and Ines Soto. 

Another person has been charged with obstruction of justice and conspiracy for attempting to conceal and destroy evidence, prosecutors said.