Background: Rachel Jeantel was a friend of Trayvon Martin.
Involvement in case: Jeantel says she was on the phone with Martin when he encountered George Zimmerman in Sanford. She was interviewed by Martin family attorney Benjamin Crump, who recorded the interview and played it at a news conference in 2012.
Jeantel took the stand at Zimmerman's trial, saying she heard Zimmerman confront Martin.
In March 2013, prosecutors told a judge that Jeantel said that she was at a hospital during Martin's funeral. The defense then sought her medical records, to which the state conceded there were no records to show she was in the hospital.