SAN ANTONIO — Three people are facing charges in connection with a deadly Northeast Side shooting, and new court documents detail what investigators say happened before and after the gunfire.

Martin Sanchez Jr. is charged with tampering with evidence and failure to report a felony, while Robert Barnett and Kyle Erin Torres-Carcovich are both charged with failure to report a felony.

RELATED: Gunman unloads about 10 rounds into car, killing man and wounding his mother

The charges stem from the shooting death of 31-year-old Andrew Locke, who was shot to death around 2:30 a.m. Monday near Waterside and Crestway roads.

Locke was sitting in the back seat of a Mitsubishi Lancer when someone in a white Volvo pulled alongside the car and opened fire.

Locke was shot multiple times and died at the scene. His mother, who was sitting in the front passenger seat, was also shot several times and taken to the hospital in stable condition. Two other women were inside the car, including a family friend who was not hit.

At the scene Monday morning, Bexar County Sheriff Javier Salazar said the number of shots fired stood out to investigators.

To empty 10 rounds into a car, that to me, again speculation, but to me that indicates a high level of anger,” Salazar said. “You really want harm or death to come upon the people in a vehicle to empty 10 rounds into it.

At the time, investigators didn’t know what led to the shooting. Salazar said completely random attacks are unusual and suspected there may have been some connection between the people involved.

“Look, straight up random acts of violence like this are rare. It does occur, but it is rare,” Salazar said. “I believe that there was some sort of interaction or relationship between these folks at some point.”

The arrest reports now provide a more detailed picture of what investigators believe happened.

Witnesses said Locke and the others had stopped at a home on Laura Street for about 20 minutes before heading toward Waterside Road. They reportedly noticed a white Volvo parked along the road.

When their car stopped near Waterside and Crestway, witnesses said the same Volvo pulled alongside them and someone inside opened fire.

Investigators soon found another piece of the puzzle. A license plate reader captured a white Volvo near New World and Miller Road at 2:26 a.m., about a half-mile from the shooting scene and roughly one minute before the shooting was reported.

Hours later, investigators spotted what they believed was the same Volvo at a home on Clay Oak Drive. According to the arrest reports, a man and woman were seen cleaning the vehicle inside a garage. Investigators learned the Volvo was a loaner from a local dealership.

The Volvo was later returned to the dealership, where Barnett and Torres-Carcovich were taken into custody.

During separate interviews, both pointed investigators to Sanchez, saying he had been sitting in the back seat of the Volvo when the shooting happened.

Barnett told investigators Sanchez was sitting directly behind him when he said, “I’m going to light them up,” before firing out the window toward Locke’s car, according to the arrest report.

Torres-Carcovich gave investigators a similar story, saying Sanchez fired from the back seat.

Barnett and Torres-Carcovich also said they both talked about whether they should contact authorities after the shooting but decided against it. Torres-Carcovich told investigators she wanted to turn themselves in but was discouraged by the phrase “snitches get stitches.”

Sanchez said he had contacted Torres-Carcovich through WhatsApp earlier that morning because he wanted to get drugs. He told investigators his drug of choice was methamphetamine. Sanchez also confirmed the seating arrangement described by the others, saying Barnett was driving, Torres-Carcovich was in the front passenger seat and he was in the back.

But investigators said Sanchez’s timeline didn’t match the evidence they had collected.

Sanchez reportedly claimed Torres-Carcovich picked him up around 4 a.m. Surveillance video, however, showed Sanchez, Barnett and Torres-Carcovich together at a Valero gas station around 3:10 a.m., less than an hour after the shooting.

That gas station stop became another key part of the case.

Barnett told investigators he believed Sanchez threw away shell casings that had fallen inside the Volvo after the shooting. Surveillance video reportedly showed Sanchez rummaging through the back seat before throwing items into a trash can.

Investigators searched the trash and said they found spent shell casings.

Sanchez later invoked his right to remain silent, and the interview ended.