A Federal Way man has been charged with murder after being accused of fatally shooting another man Aug. 17 in Seattle.

Jonathan C. Webb, 41, is being held on $1 million bail, according to charging documents. The Federal Way man has been charged with first-degree murder in the death of 46-year-old Walter Jay Treadwell.

A “heated argument” between the two men took place on a Metro Coach bus in Seattle and led to the fatal shooting, according to documents.

Around 9:50 p.m. Aug. 17, Seattle police responded to reports of a shooting in the 4600 block of Aurora Avenue North. On the east side of the street, officers located Treadwell unresponsive on the sidewalk, according to documents.

The King County Medical Examiner would later determine his death was the result of having been shot three times with “one of the bullets having struck Treadwell’s heart,” charging documents state.

Webb, the suspect, had fled the scene before officers arrived. Later investigation discovered both Webb and Treadwell had been passengers on the bus that night and had disembarked prior to the shooting, according to documents.

Video and audio captured by cameras inside the Metro bus show both men sitting toward the rear of the sparsely occupied bus, with Webb seated a few rows in front of Treadwell.

“The cameras captured a heated argument between the victim and the suspect, at times during the argument Treadwell was standing over Webb while Webb remained seated,” according to probable cause documents.

As the bus came to a stop along Aurora Avenue North, Treadwell waited by the rear door to exit as Webb waited in his seat. As Treadwell exited, Webb stood up and followed, according to documents.

“After disembarking, Treadwell put his belongings down in the bus shelter and he took his shirt off and raised his arms,” according to documents. “Immediately upon exiting, [Webb] threw a pair of shoes he was carrying to the ground and pulled out a firearm.”

Webb pointed the .380 handgun directly at Treadwell and pulled the trigger, but it did not fire. Webb “racked the slide,” aimed the gun at Treadwell again and fired three rounds into him, according to documents.

During a later police investigation, Webb claimed he acted in self-defense.

“The defendant’s actions in this case demonstrate a clear risk to pubic safety,” charging documents state.