UPDATE: A Chattanooga jury has found Santory Johnson guilty of 2nd-degree murder in 2013 death of Christopher Jones.

PREVIOUS STORY: The murder trial of a Chattanooga man accused of killing his neighbor at a party in 2013 began Tuesday.

Santory Johnson, 37, is charged with first-degree murder. He is accused of shooting Christopher Jones, 24, at a home in Alton Park in October 2013.

Jones was a father of two young sons.

PREVIOUS STORY: Prosecutors say the shooting happened after an argument between Johnson and Jones, because Johnson fired a shot near Jones' family, including his grandmother.

"(Johnson) pulled out a gun and shot it in the air," Amber Rushing recalled the last night she saw her boyfriend, Jones, alive.

The 24-year-old was having a night out at a party at Johnson's house. Rushing was in the car, along with Jones' cousins and grandmother to pick him up from the party. Rushing testified that Johnson became angry and fired a shot near their car.

"Christopher Jones asked him, 'Why are you doing that? My family's in this car'," said Asst. District Attorney Kristen Spires.

According to the state, Jones and Johnson were friends and neighbors. Later in the night night, Jones returned to the party to confront Johnson about the gunshot.

"Christopher Jones didn't go there to threaten Mr. Johnson," Spires said. "He didn't have a weapon. He went there to talk to him."

The two got into a heated argument, and Jones was shot multiple times inside his vehicle before he collapsed on the pavement.

Rushing discovered him in the street.

"His shirt was bloody. I started screaming for help," she said.

Johnson is pleading "not guilty", and his public defender says there are holes in witnesses' stories.

"Reliability is a continuing and problematic theme in this case," Johnson's attorney, Eliza Epps, told the jury.

The trial is expected to last several days.