ROCHESTER, Minn. (KTTC) -- Rochester Police have released new details about a shooting in Rochester that killed one person. RPD says the deadly shooting was a drug deal gone wrong.

According to the criminal complaint, 24-year-old Trevor Boysen was killed over 70 dollars worth of marijuana.

It happened at just after 2 p.m. on Friday. Police found Boysen with gunshot wounds in the parking lot of the Quarters Apartments in SE Rochester.

Officials say 18-year-old Robert Salley Jr. lives at the complex where the shots were fired. Police said surveillance footage shows Salley Jr. shooting at and killing Trevor Boysen, 24, of Rochester, while Boysen was in his car.

At least six shots were fired, police said.

RPD said Salley Jr. fled the scene and was arrested at Oak Terrace Estates at about 2:50 p.m. Police said he was found with a handgun that investigators believe was used in the shooting.

In the criminal complaint, Salley says he was the one purchasing the drugs -- and that Boysen pulled out the gun first, saying Salley "had a bounty on his head." It lead to a struggle between the two with the gun, causing it to shoot inside the car three times. The complaint goes on to say that the car door opened, Boysen fell out and Salley was able to get the gun and get out of the car. Salley says in the complaint he fired at least once towards the car before running off.

County Attorney Mark Ostrem says the investigation is still in its beginning stages.

"As this investigation evolves we hope to learn more about what exactly happened," Ostrem said. "We certainly hope to. But, clearly it appears the sale of drugs is the reason that these two people came together on Friday."

Ostrem says the number of crimes involving gun violence in Olmsted County-- is alarming.

"A lot of gun violence going on. I don't know if we have had a lot of homicides, but we've had a lot of shootings," Ostrem said. "A lot of people injured with gunfire. The issues of violence with weapons is very concerning."

Salley was arraigned Monday. He faces a 2nd degree murder charge, in addition to being a felon in possession of a firearm and ammo.

This is not Salley's first offense.

"He's accumulated a fairly significant track record," Ostrem said.

Ostrem says Salley has three previous juvenile criminal convictions -- including terroristic threats, an assault and another previous charge of a felon of a firearm.

The investigation is ongoing.

"There's still a lot to do in this case," Ostrem said. "It was pretty impressive how the Rochester Police Department and State Patrol got together and got this guy so quickly. That's pretty impressive."