ROCHESTER, N.Y. – Since Dave Treese III was killed Monday morning, his grieving coworkers have been trying to piece together his last few hours alive.

Treese worked as a cab driver with Associate Taxi for the last seven years.

On Monday, a dispatcher at Associate Taxi tells News10NBC Treese was sent to First Street to pick up a fare. A little while later, his boss Averill Moore says Treese called the dispatcher and told them he had been in an accident. Then, the call disconnected.

Just after 4 a.m., Rochester Police got a call about an unresponsive man on the side of Bay Street.

It was Treese. He had been shot and killed. His abandoned car was later found on Central Park.

No arrests have been made as of Tuesday night in the killing of Treese.

Treese’s co-workers are trying to understand how someone could do this to Treese.

“He’s a good guy,” Moore said. “It’s sad that they would just do something like that to him.”

Moore says this is not the first homicide to hit home or his heart — and says the cases all remain unsolved.

Marsha Augustin: Is this the first time something like this has happened to one of your guys?

Averill Moore, owner, Associate Taxi: No, No. This is, um, well. he makes number four.

Marsha Augustin: Four!

Averill Moore: Yup!

Moore has been in the taxi service for about 20 years. He says the violence is out of control and many of his drivers are not feeling safe and are turning in their plates.

“You got the violence with people jumping in and out of the cabs,” Moore said. “At one point you had 82 cars, yeah. At one point you had 82 cars and now? Now I’m down to like 16.”

After learning of Treese’s killing, Moore has been overwhelmed with emotions. “I was pretty pissed off and just bawled for a while. … Nobody should die like that. That shouldn’t happen to anybody.”

Moore recalls Treese as a dedicated and generous employee. If someone didn’t have enough money to pay, he would still take them to their destination.

“Dave, for instance, would give people rides, old people rides to the store and back and don’t charge them, and help them with their groceries. Uber’s not going to do that. But Dave out of the kindness of his heart would do that,” Moore said.

Police believe Treese was killed during a robbery. Moore says this wasn’t the first time Treese had been robbed.

“And all they had to do was ask. He would’ve probably gave it to them, ’cause he got shot once before,” Moore said. “The guy was asking him for money. He just came out and told them, listen, I just came to work, I don’t have that much money, and the guy got mad and shot him in the leg. And now this? It’s like, c’mon. With this violence this generation, I don’t understand this violence and why they are so angry. I’m sorry. It’s just sad. Just sad.”

Moore says the manner in which Treese was killed was “savage-like” and he wants justice for him.

“They have a big camera right there. I just saw it two days prior, so I said hopefully they got it on film and they can catch these guys. And put them in jail forever — throw away the key.”

Police are asking anyone with information to call 911.