GRAFTON, N.D. — Mary Jo Schapp has been a nurse for 11 years at Unity Medical Center in Grafton, N.D.
Schapp is currently on medical leave from her job as an emergency room nurse after a July swimming accident left her with a broken back.
Doctors say she is lucky to be walking.
On the night of Aug. 14, Mary Jo's son, Daelen Schapp, woke her up in the middle of the night. He thought he heard gunshots.
"I went in there and told her and she didn't believe me," Daelen said.
Mary Jo and Daelen got in the car to investigate.
"It's probably not gunshots, it's probably fireworks or something," she said.
A few blocks away, as they turned onto Seventh Street, the adrenaline kicked in.
"When I looked to my right, I see an officer with a person down that was covered with a lot of blood," Mary Jo said.
She jumped out of the car. Daelen, not yet knowing how to drive, got behind the wheel to park find a place to park.
"There was a millisecond of fear, and then I just jumped into the mode of saving lives," she said.
She remembers the only time she thought of herself, running across the street to the next gunshot victim and hoping she didn't fall in her pajamas, neck brace, and Crocs.
The first man Mary Jo helped was Ruben Cruz who, according to police, fled and fired multiple rounds at officers while they attempted to arrest him on a federal drug warrant.
The shots hit 22-year-old Officer Lucas Campoverde in the chest. Campoverde's partner returned fire, hitting Cruz.
"I was never so relieved in my life as the ambulance showed up with help," she said.
As she worked, Daelen stood close, holding the IV bag above Officer Campoverde.
When it was time to leave, and the ambulance driver was with the other victim, Mary Jo hopped in the front seat driving an ambulance for the first time.
"They're like, just go and I'm like, alright I know where the gas pedal is and the break and drive," she said.
Both Cruz and Campoverde would live. Campoverde was transferred to Altru Health System in Grand Forks, where he left the hospital to see police officers from around the region supporting him.
"I cried like a baby but I didn't want my kids to see me so I went into the shower," said Mary Jo, "If it was one of my kids, I hope that somebody driving by stops."
It's because of her kids she became a lifesaver. "The nurse that I had when I delivered him inspired me to become a nurse," she said,
"She made me feel like I was her only patient," Mary Jo says. A career she never clocks out from, in scrubs or in pajamas.