Prosecutors will not bring charges against the FBI agent who fatally shot 28-year-old Troy Bullock inside the Metro Center station in December. The U.S. Attorney’s Office for D.C. said in a press release Tuesday that there was not enough evidence to pursue federal criminal civil rights charges or any local D.C. charges against the agent, whose name authorities have not publicly disclosed.

“After a careful, thorough, and independent review of the evidence, federal prosecutors have found insufficient evidence to prove beyond a reasonable doubt that the agent used excessive force under the circumstances,” the prosecutors’ office wrote in a press release.

USAO said it came to its conclusion after a “comprehensive review” of eyewitness accounts, surveillance footage, physical evidence, cell phone footage, radio communications, forensic reports, and Bullock’s autopsy report.

According to their review of the evidence, the agent, who was off duty at the time, saw Bullock trying to challenge someone on the Metro platform to a fight. The agent intervened to try to “defuse the situation,” according to the USAO’s press release. At that point, prosecutors say, “Mr. Bullock then became physically aggressive toward the agent,” grabbing him and pushing him over a three-foot high utility wall.

The agent and Bullock fell over the wall together – an eight-foot long fall, according to USAO. Prosecutors said Bullock then “resumed his attack on the agent,” and the agent drew his gun and shot Bullock. Bullock was pronounced dead at the scene.

The USAO says that in order to charge a police officer with a civil rights violation, they must be able to prove that in addition to using excessive force, the officer “acted with the deliberate and specific intent to do something the law forbids.”

Both the USAO for DC and MPD automatically investigate any time a member of law enforcement fatally shoots someone in the District. An MPD spokesperson told DCist/WAMU that since the USAO has declined to bring charges, their investigation ceases and the FBI will conduct its own administrative investigation to determine whether the agent adhered to their policies.

“With the USAO declination, it’s back in FBI’s hands for administrative investigation,” they wrote in an email.

The shooting caused chaos and panic at the Metro station, leading it to close for an hour.

It also left a family grieving and demanding answers. He and his fiancee were expecting a baby at the time he was killed.

In the aftermath of his death, Bullock’s family and other local activists with Harriet’s Wildest Dreams demanded that the agent be criminally charged. They wanted to know exactly why the agent shot him.

“We want to know why we will never be able to see him again, why he was taken away from us,” Bullock’s aunt, Sherlene Bullock-Turnage, said at a press conference in December. “That’s all we want to know.”

This story was updated with information from MPD about the status of its investigation into the shooting.