The three men are Salgado Araujo’s brother, Victor Hugo Salgado Araujo, and two workers, Daniel Tirado Pantoja and Jose Trinidad Rojas Pliego, Proaño told TNR. Family members who are in touch with them confirmed the pressure to sign self-deportation orders, Proaño says, adding that some of the men may be inclined to do so to avoid longer-term detention.

“We want full public disclosure of the eyewitness accounts of what actually happened on the day that Lorenzo Salgado Araujo was killed,” Proaño said. The pressure to self-deport, Proaño added, looks like “an effort by DHS to get rid of the only eyewitnesses to what happened.” Asked for comment, ICE emailed a statement that didn’t address the three men’s status and referred questions to the FBI.

There are other reasons to doubt that Salgado Araujo would attempt to kill an officer. NBC reports that DHS hasn’t said that the man has a previous criminal record. And Salgado Araujo’s son, Ronaldo Salgado, says that the family had actually been preparing for the possibility that he might be picked up by law enforcement, given increased ICE activity in Texas. The family had a plan, according to The Washington Post: He would comply if arrested, refrain from signing anything, and wait for the family to try to get him released.