As the Miami-Dade Sheriff's Office is still mourning the loss of Deputy Devin Jaramillo, the agency has identified the man who shot and killed him on Friday.

Steven David Rustrian, a 21-year-old man from Miami, was identified by MDSO as the suspect with whom Jaramillo got into the deadly altercation as he was responding to a crash near Kendall on Friday afternoon.

Additionally, MDSO said that the second individual who was originally detained was released and no formal charges were filed at this time. The agency did not identify the detained individual.

A crash investigation turns into a deadly encounter

Just before 4 p.m. Friday, deputies responded to reports of a deputy who had been shot near 12214 SW 128th St. near Kendall. Preliminary investigations revealed that Jaramillo was responding to a crash in the area, MDSO said.

A source familiar with the investigation told CBS News Miami that the incident began when Rustrian got into a minor traffic accident with another car near the Enterprise Rent-a-Car at 12394 SW 128th St. However, Rustrian didn't immediately stop and continued driving, pulling into a parking lot about a tenth of a mile down the street. Rustrian, according to the source, parked in a marked space between two other vehicles, perhaps in an attempt to hide.

Before the deputy arrived, Rustrian convinced his boyfriend, who was in the car with him in the passenger seat, to switch places with him, the source told CBS News Miami.

Although the reasons why Rustrian swapped seats with his partner remain unclear, CBS News Miami's partners at The Miami Herald found online databases that suggested Rustrian lived in Jamestown and Shirley, New York, where a man with the same name had previous run-ins with New York State law enforcement. It remains unclear whether these two men were the same individual.

When Deputy Jaramillo arrived on the scene near the car rental agency, witnesses to the crash pointed out the location of Rustrian's car and warned the deputy that they had seen Rustrian swapping seats with his boyfriend, the source told CBS News Miami. By the time Jaramillo approached the vehicle, Rustrian was already in the passenger seat while his partner was behind the wheel.

The source told CBS News Miami that the deputy's body camera was on and recorded the deputy approaching the vehicle and questioning Rustrian's partner, who quickly admitted that it was Rustrian who was driving the car at the time of the crash.

Jaramillo then walked around the car to confront Rustrian, with the situation quickly escalating as Rustrian got out of the car and began arguing with the deputy. When Jaramillo tried to place Rustrian under arrest, a fight ensued. Jaramillo was initially able to get on top of Rustrian in the struggle but Rustrian somehow managed to grab the deputy's gun from its holster and shoot the deputy.

After pushing Jaramillo off of him, Rustrian got back to his feet and continued shooting at the deputy, yelling and taunting him, the source told CBS News Miami. 

At this point in the encounter, Jaramillo was unarmed and unable to call for help because he had lost his radio in the struggle. He attempted to get up and run, but Rustrian continued to shoot him.

After fatally wounding the deputy, Rustrian retreated to his car and killed himself with the deputy's gun.

The source familiar with the investigation told CBS News Miami that the first law enforcement officer to reach Jaramillo was a federal agent who was passing by the scene and performed CPR on Jaramillo as he lay mortally wounded.

Amid the chaotic and violent scene, Rustrian's boyfriend briefly left the area before returning, where he was detained for questioning. He has been cooperating with authorities, the source told CBS News Miami. It is unclear whether the person MDSO said they had detained and since released was Rustrian's partner or another individual tied to the investigation.

A community in mourning

Hundreds of first responders from across South Florida waited outside HCA Florida Kendall Hospital in support on Friday, with Miami-Dade Fire Rescue lifting up an American flag for the motorcade on Bird Road. Around 8 p.m. that night, a motorcade escorted Jaramillo to the medical examiner's office.

"What happened to our deputy was not OK," Cordero-Stutz said. She said she prays that they find a way for incidents like this one to never happen again.

"I want to tell you that behind this uniform, we are human beings," said Cordero-Stutz. 

She described Jaramillo as not only a deputy, but a son, a friend and a homegrown hero. Cordero-Stutz said Jaramillo graduated from the academy in May 2024. 

"He could've done anything, but he chose public service," she said. 

She said he gave the ultimate sacrifice, his life.

"The next few days are going to be very difficult for us," Cordero-Stutz said. "We will still continue to make this county safe."

"I ask this community to continue to hold us in your prayers because we need them," she said Saturday.

On Saturday afternoon, Jaramillo was then escorted from the medical examiner's office to a funeral home. At this time, no service plans have been announced.