DALLAS -- Dallas Police Sr. Cpl. Cassie Dotsy doesn't want to be called a hero. She says she was just doing her job.
With the help of two Good Samaritans, the 10-year police veteran took down an armed robber who was shooting inside a east Dallas Walmart in the parking lot.
Dotsy was in the parking lot working on a traffic report around 10 p.m. Tuesday night when she first heard the shots.
"I knew they were close," she said in a news conference Thursday.
Then, she saw people running out of the Walmart Supercenter in the 7400 block of Samuell Blvd.
"I saw citizens running, I saw kids, I heard shots, and I just reacted to what is natural when you are in the profession I am in," she said.
Dallas police say the suspect, Marcus Booker, fired his weapon in the store when a cashier didn't give him the money he was demanding fast enough, then kept shooting as he ran out the door.
"I started to go towards the Walmart," Sr. Cpl. Dotsy recalled Thursday. "I saw the arrestee coming out, and he was shooting, and I knew this was going to be really bad."
Dotsy said she ordered Booker to drop his gun, as he was complying, two Good Samaritans tackled him, so the officer could cuff him.
"It was so dynamic," she said. "The man was shooting, and [the Good Samartians] didn't care that he was shooting."
Sr. Cpl. Dotsy said they were courageous.
Dotsy's mother was a sheriff's deputy. She says, her whole life, she wanted to be a Dallas police officer.
On Thursday, Dotsy said her mother was concerned about what happened, but proud of how her daughter handled herself.