Trayvon Martin's Father Told Police That Wasn't His Son Screaming

Which suggests it was Zimmerman's voice

The lead detective in George Zimmerman's second-degree murder case says Trayvon Martin's father told him that screams for help on a 911 call weren't his son's.

Officer Chris Serino was called by the defense Monday to testify about a meeting with Martin's father in the days after the Miami teen was fatally shot by Zimmerman.

Serino says at the meeting, when Tracy Martin listened to the 911 recording and was asked if it was his son, Tracy Martin said "no."

Tracy Martin was in the courtroom Monday as Serino recounted the meeting.