The family of a man who died after being struck by a Metro train at the Virginia Square station in July 2017 is suing the transit agency over his death.

WMATA surveillance cameras captured Walter Coulston Jr. of Vienna, Va., on the westbound Virginia Square train platform in the minutes before he died. The lawsuit, filed in District Court last week, contends that WMATA and several of its employees acted negligently on the day of Coulston’s death, failing to intervene even as Coulston paced the train platform for nearly nine minutes, and then lay down on the track for about two minutes. The complaint names WMATA, its Virginia Square station manager on the day of Coulston’s death, and the train operator of the Metro train that hit him.

“At no time while Mr. Coulston was present on the westbound platform of the Metro station, did an employee or agent of WMATA … make any attempt to assist or speak to Mr. Coulston, or to intervene when Mr. Coulston entered the train tracks,” the complaint reads. “At no time while Mr. Coulston was present on the westbound platform … did John Doe [the station manager] appear on the westbound platform to investigate Mr. Coulston’s strange behavior or intervene and remove him from the train tracks and out of the path of oncoming Metrorail trains.”

Coulston’s behavior was visible via surveillance camera streamed into the station manager’s kiosk, which the station manager was required to monitor at all times, according to the complaint. The video was also observable in the Railway Operation Command Center, the suit says, which should have also seen Coulston and enacted measures to make sure he was not hit by a train.

On July 13, 2017, Coulston exited a train on the westbound platform of Virginia Square, and began wandering around the platform, the complaint states. He was the only person on the platform, according to the suit. At one point, Coulston walked over to the edge of the platform and looked at the tracks below, eventually sitting with his legs dangling over the edge for about 20 seconds before getting back up to pace the platform again. He also peered over a parapet for about 36 seconds, the complaint says. In all, Coulston paced around the platform for eight minutes and forty seconds before lying down on the tracks. He lay on the tracks for two minutes and 16 seconds, sitting up as a westbound train pulled into the station. The train operator did not stop the train and struck Coulston, killing him.

Coulston had a history of mental illness and depression, according to the complaint.

The suit accuses the train operator and station manager of failing to pay proper attention to their job duties, failure to monitor the Metro station, failure to press an emergency stop button on the train before striking Coulston, and failure to comply with Metro’s own safety guidelines, along with several other accusations of negligence in carrying out their jobs. The suit is asking for $25,000,000 for wrongful death.

Metro declined to comment on pending litigation.