SANFORD, Fla. -

The father of Trayvon Martin, the teen shot and killed by a neighborhood watch leader in Sanford, Fla., said at a news conference Friday morning that he feels "betrayed" by police as the family's attorneys demanded that an arrest be made in the case.

Tracy Martin and Sybrina Fulton, the parents of Trayvon Martin, spoke to the media at attorney Natalie Jackson's office on East Washington Street in Orlando.  They were joined by Mary Cutcher, and her roommate, who are witnesses in the shooting.

"I'd like to thank these women for coming forward and trying to get justice for our son, Trayvon," Tracy Martin said.  "We're not getting any closure, any answers, and it's very disturbing.  As a father, I'm hurt.  I feel betrayed by the Sanford Police Department."