JACKSONVILLE, Fla. -

After two long days of emotional testimony, Chontel Gergar says she has faith a jury will convict the 21-year-old charged with killing her son.

"I can't eat. I can't sleep," Gergar said. "If I close my eyes, all I do is picture him laying there on the ground that night."

Prosecutors say Jeremiah Corbett shot 14-year-old Horace James Jr. in the head Sept. 25, 2010.

Friends with Corbett that night testified he felt disrespected after becoming involved in an argument between two teenage girls and an ex-boyfriend in a parking lot near Club Menage on University Boulevard in Arlington.

LISTEN: 911 calls night of shooting | IMAGES: Evidence photos in killing

Bryant Smith testified that Corbett is responsible for the rapid fire shots that not only killed James (pictured, below) but injured two other teenage girls.

"I didn't know if they were intentionally trying to get rid of witnesses or not," Smith said. "But I'm scared, and I don't say nothing. Because they just got done shooting, and I don't know what's going on. I'm scared and shocked."

Horace Lee James Prosecutors showed a recorded interview between Corbett and detectives in which he denied knowing anything about the shooting.

"You know what this looks like? It looks like the world is against you," a detective told Corbett.

"I had nothing to do with nothing. I didn't get in no van with anybody," Corbett said.

In closing arguments Wednesday, prosecutors told jurors this case centers around a bruised ego and a hot temper.

But the defense argued Corbett isn't the one who pulled the trigger.

"There is no evidence of DNA or fingerprints that ties Jeremiah Corbett to this case," defense attorney Chuck Fletcher said.

Before the jury was charged Wednesday, James' sister spoke as the family left the courtroom.

"God always taught me to forgive people and he'll forgive me," Markeisha Rivers said. "But I won't forget what he did to my brother."

Corbett's girlfriend said their 3-year-old son asks every night when his daddy is going to come home. She said this case has torn both families apart.

The jury was dismissed for the evening and will begin deliberating Thursday morning.

Prosecutors had filed for the death penalty, but it was waived. If convicted, Corbett will face life in prison.