CBS 58MILWAUKEE (CBS 58) -- Three Milwaukee siblings have been charged with conspiring to intimidate a key witness in an armed robbery trial by threatening her with immigration enforcement, according to two criminal complaints issued in Milwaukee County Circuit Court. The witness testified Tuesday, July 22 against 31-year-old James Jamall Hughes, who was on trial while jailed for robbing her of a Ford Edge. During the recorded call, he gave her the victim’s phone number and told her to send a message that read "ICE" with the date of testimony. Mulbah later admitted she and her sister, 29-year-old Betina Hughes, carried out the plan and contacted immigration authorities, according to the complaint. The witness told investigators two women in the courtroom appeared to record her while she testified.