Fort Worth police say the victim was driving home from work on April 1 when she was shot in the head.

Updated at 1:50 p.m. with additional information from an arrest warrant affidavit.

A 34-year-old man was arrested Tuesday and faces a murder charge after he allegedly shot a 70-year-old woman in the head last week, officials say.

Jeffery Watson, 34, is the suspect in the shooting and is being held in jail in lieu of a $250,000 bail, according to authorities.

Fort Worth police said around 11:45 a.m. on April 1, officers responded to a major car accident near 2900 West Loop 820 South.

When they arrived at the crash scene, officers said a black Toyota Camry had veered off the street and into the median. The driver then crashed into a guardrail before coming to a stop, police said.

According to authorities, Julia Gregor, 70, was the driver of that car and was going home from work when she was shot in the head and lost control of her vehicle.

Gregor was transported to a local hospital, where she was later pronounced dead.

Fort Worth police say surveillance footage and witness interviews showed that there were several other vehicles driving near Gregor's car at the time of the shooting.

According to an arrest warrant affidavit, officers were able to identify Watson as the suspect after receiving an anonymous tip after posting about the incident on Facebook.

He initially denied being involved in the shooting during an April 6 interview with homicide detectives, but then admitted he got upset after Gregor was driving too slow in the fast lane the day of the shooting, according to the affidavit.

Watson told detectives that he and his cousin were behind Gregor's vehicle when she allegedly slammed her brakes on them. He then got upset, drove in front of her and slammed his brakes, documents state.

At this point, Watson claims the Gregor "flipped him off." He then pulled out a gun and tried shooting at her tires twice, the affidavit says.

According to court documents, Watson says he says wasn't sure if he had shot Gregor until he saw a news article about the incident. That's when Watson asked his cousin to hide the gun that was used.

On April 7, homicide detectives met with the suspect's cousin, who told authorities that Watson was responsible for the shooting.

Later that day, police were able to obtain a search warrant and found the same gun that Watson allegedly used during the road rage incident, the affidavit says.