(CNN)A Texas man is facing a first-degree murder charge related to the fatal shooting of a man sitting in a parked car outside his home earlier this month in a case the victim's family believes could test the limits of the state's so-called stand your ground law.

The confrontation began in the early morning hours of October 11 in Martindale, a small town about 35 miles south of Austin.
Terry Duane Turner, 65, told police he woke up to use the bathroom and "discovered an unknown vehicle with its headlights off, to be parked inside of the driveway next to his pickup truck," according to an arrest affidavit obtained by CNN.

Turner said he returned to his bedroom to get his handgun and ran outside to find the headlights of the vehicle turned on, according to the affidavit. Turner told police that the car rapidly backed out of his driveway, he chased after it, and "struck the front driver's side door window twice with his handgun" and fired the gun, striking the driver, the affidavit said.

The victim was identified as Adil Dghoughi, 31, according to police.

Dghoughi's girlfriend, Sarah Todd, told CNN the couple was visiting her cousin in San Antonio prior to the shooting and Dghoughi left to drive back to her home in Maxwell. Todd believes Dghoughi got lost in Martindale and pulled over to look up directions when he was killed.

According to court documents, Turner told a 911 operator after the shooting that "I just killed a guy," adding that Dghoughi "started racing away and I ran after him. He pointed a gun at me, and I shot."

Investigators didn't find a gun in Dghoughi's possession, according to the affidavit.
Turner turned himself in Friday morning on the felony murder charge, according to Caldwell County's Criminal District Attorney Fred Weber. Turner was booked shortly before 10 a.m. and bonded out less than two hours later, according to online records from Caldwell County.