SAN FRANCISCO (KGO) — John Windle says he was leaving his offices on San Francisco’s Geary Street Saturday afternoon when he witnessed something he’d never seen before.

“I saw two guys fighting about 20 yards away, 30 yards away at the most. And I thought, oh great another punch up on the street. And then bang, bang, bang,” Windle said.

That scuffle and shooting Windle witnessed involved 49ers rookie and first-round draft pick, Ricky Pearsall.

Pearsall was shot through the chest after a 17-year-old attempted to rob him while he was walking down the street near Union Square.

The incident happening just hours after he appeared at an autograph signing event just miles away.

“It was at the moment, just simply shocking. It wasn’t until later that I began to shake,” Windle said.

Windle tells ABC7 News reporter Tim Johns the entire encounter happened rapidly and was over within a minute or so.

He says shortly after the gunshots rang out, he saw police who were stationed nearby running towards the scene.

“The police response was fantastic. They had that place swarmed,” Windle said.

The first officer to arrive was Sgt. Joelle Harrell. Sgt. Harrell is being described as a hero, who may have saved Pearsall’s life.

Our colleagues at ABC News spoke with her on Monday.

Harrell describing hearing the gunshots and then running to find Pearsall on the ground in a pool of blood to ABC News reporter Melissa Adan.

“I use my right hand, because this is my strong hand, to seal the wound. And then I put it up here to hold that,” Sgt. Harrell said.

The sergeant says while they waited for paramedics to arrive, she knew keeping Pearsall conscious and calm was paramount.

She detailed some of their conversation during those critical minutes.

“I know you don’t know me but please trust me, God is with us. It’s not your time, okay, it’s not your time. I want you to continue to breathe. Just breathe,” Sgt. Harrell said.

Thanks to Pearsall’s description, SFPD was able to identify and arrest the suspect.

The NFL rookie is now out of the hospital and recovering at home.

But the reputational hit the incident has on San Francisco may be harder to recover from.

On Monday morning, we went back to Union Square to talk to tourists about their perception of the city following the shooting.

Almost all of them told us they had heard that the city was unsafe ahead of their visits.

That included Billy Seiba and his family, who are visiting from Texas.

“It was dirty, a lot of hearing about crime and stuff like that,” Seiba said.