alderas-Ibarra said on Instagram.

The other men detained by ICE included Salgado Araujo's brother. ICE has not released their names, but family members said they have been able to briefly talk with them.

ICE is pressuring the men to self-deport which would make it harder for them to share their version of events with investigators or others, and Daniel Tirado Pantoja has no legal permission to live in the U.S. but has no criminal record, his stepdaughter said.

 We just told him not to sign anything, that we're going to fight this case,  Juana Degollado told The Associated Press.

DHS said these allegations are  categorically false. 

When asked if officers were specifically targeting Salgado Araujo, DHS said Thursday that officers investigating a tip weeks before the shooting saw two white vans at the address of a target. While heading to that address Tuesday, officers saw a white van and someone inside who resembled the person they were looking for, the department said in a statement.

DHS said it will not release the officer's name because they could face threats and violence and their family could be at risk.

DHS also has not responded to requests for other information, including how long the officer has worked for ICE or whether anyone involved in the shooting is administrative leave. The department has taken a similar stance after previous fatal shootings involving its officers, unlike many local and state agencies that routinely identify and provide biographical details about officers involved in critical incidents.

Unlike some previous deaths involving federal immigration officers, few photos or videos surrounding the shooting have emerged publicly in the days since Salgado Araujo's death.

The League of United Latin American Citizens offered a $5,000 reward for video or other evidence but the positions of the vehicles means surveillance cameras in the area were blocked from recording the shooting, Proaño said.

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Brook reported from New Orleans and Foley from Omaha, Nebraska. Associated Press reporters Rebecca Santana in Washington, D.C.; and Jeffrey Collins in Columbia, South Carolina, contributed.