Defense attorneys for George Zimmerman have begun presenting their case after prosecutors wrapped their side on Friday. Zimmerman faces second-degree murder charges for the killing of Trayvon Martin, an unarmed African-American teenager. On Friday, Martin’s mother, Sybrina Fulton, and his older brother, Jahvaris Fulton, told the jury that a voice briefly heard screaming for help on a police phone call was Martin’s.

Prosecutor: “Ma’am, that screaming or yelling, do you recognize that?

Sybrina Fulton: “Yes.”

Prosecutor: “And who do you recognize that to be, ma’am?”

Sybrina Fulton: “Trayvon Benjamin Martin.”

Jahvaris Fulton: “I guess I didn’t want to believe that it was him. So that’s why during that interview I said I wasn’t sure. I guess it was — listening to it was clouded by shock and denial and sadness. I didn’t really want to believe that it was him.”

Zimmerman’s attorneys later called family members to testify they believe the voice was his. The trial continues after the presiding judge rejected a defense motion to dismiss.