SUTHERLAND SPRINGS, Texas – A woman says her boyfriend witnessed the end of the church shooting in Sutherland Springs and, with the help of a neighbor, gave chase to a person they suspected was the shooter.

Summer Caddel said her boyfriend, Johnnie Langendorff, called her moments after the shooting at First Baptist Church and told her that he saw a gunfight between the shooter and a neighbor, who was returning fire.

Langendorff then told Caddel the suspect -- identified as Devin Patrick Kelley -- then got into an SUV and drove away, and the two gave chase.

While on the phone with 911, Langendorff told his girlfriend the chase came to an end near a sharp curve near country roads 307 and 539.

Caddel understood that to mean the Kelley crashed. Moments later law enforcement officers arrived, she said.

She also said she has not spoken to her boyfriend in hours and that his phone was taken as evidence.

At least 20 people have been killed in the shooting, according to Wilson County Sheriff Joe Tackitt. Many more have been injured, authorities said.

The shooter was killed after a brief chase north into neighboring Guadalupe County, according to Guadalupe County Sheriff's Office spokesman Robert Murphy. The chase ended when Devin Kelley took his own life.