Attorneys for Martin’s family said it wasn’t until weeks later, when Tracy Martin, Trayvon’s father, was looking through the teen’s cell phone bill that he noticed the timing of the last call. The family and their attorneys then contacted Trayvon’s girlfriend and heard her account of the night. Lawyer Benjamin Crump, who represents the family, recorded an interview with the girl and provided it with Martin’s cell phone records to federal authorities, who by then had joined the investigation.
UPDATE: Tallahassee, FL - March 20, 2012
Federal and local prosecutors are launching parallel investigations into the fatal shooting of an unarmed black teen by a neighborhood watch captain as outrage over the case grows.
According to the source close to the investigation, authorities have a subpoena for Martin’s phone records and are waiting to electronically unlock the phone. Neither the teenage girl nor her parents came forward to offer details to police in the three weeks since the shooting, despite a public plea for information, the source said.
Several investigators don’t believe Zimmerman turned back to his car but instead tried to confront or even detain Martin until police arrived, the source said, but police don’t have any evidence to prove that. Police conducted a voice stress test two days after the shooting on Zimmerman, which he passed, the source said. Another one is expected to be conducted on him soon, the source said.
Zimmerman is staying at a secure location and has been in daily contact with authorities, the source said.
Crump said he plans to turn over information about the call to federal investigators who are looking into the case.