He has been charged with first-degree murder in the February 8 shooting of 25-year-old Chad Robertson, who died Wednesday.
CHICAGO An Amtrak police officer has been charged with murder after fatally shooting an unarmed man who had been spotted smoking marijuana outside Chicago's Union Station train terminal, a police statement and court documents showed on Friday.
"Amtrak is deeply saddened to learn of the passing of Chad Robertson", Amtrak spokesman Marc Magliari told NBC Chicago.
LaRoyce Tankson, 31, is charged in the February 8 shooting of 25-year-old Chad Robertson, who died Wednesday, the Cook County state's attorney's office said.
Robertson's death came a day after his family filed a federal lawsuit on his behalf, against both Amtrak and the officer who shot him.
The construction worker was on a stopover in Chicago on a bus trip from Memphis, Tenn., to Minneapolis when the shooting occurred.
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Robertson went to Union Station to stay warm, family said, but he and a friend were asked to leave so they walked away. The officer fired twice, striking Robertson once in the back, according to the Cook County medical examiner's office.
Law enforcement sources have said Tankson was responding to a robbery at the time of the shooting, but Robertson's family has disputed that. Tankson had been an officer since 2015, court documents said. The group left to go to a restaurant, and the Amtrak officer followed them, the suit says.
Chicago police, who are leading the investigation, said last week that they did not recover any weapons on Robertson, although they did find unspecified drugs and cash at the scene.
"When he found out about his condition from the doctors, he was heartbroken", his sister, Nina Robertson, said of Robertson at a news conference.
Tankson's attorney, Will Fahy, said Tankson saw Robertson turn and reach for what Tankson thought was a gun.