In November, the Police Executive Research Forum, a Washington-based law enforcement think tank, said in a report that it was "unable to determine who issued the order to cancel bus service."
The following is a timeline for that day, compiled by The Baltimore Sun through interviews and reviews of the various reports, city emails and other documents received through Public Information Act requests.
At 12:01 p.m. the day of the clash, police received a tip from a Lake Clifton High School teacher that students indicated they would be going to Mondawmin after school "to cause a disturbance."
At 2:30 p.m., MTA police first reported an "unexpectedly high volume of students" on buses bound for Mondawmin.
At 2:33 p.m., students "begin to self-dismiss from Frederick Douglass High School."
At 2:45 p.m., a schools police officer "notifies his communications center that 'they're throwing rocks and bricks' at Mondawmin by the Dunkin Donuts."
At 2:53 p.m., a schools police officer "reports the crowd has been pushed away from the 7-11, asks the Schools Police representative in the Watch Center if buses in the area have been shut down or rerouted yet."
At 2:54 p.m., city, schools and MTA police officials in the central command center "jointly decided to divert bus service around Mondawmin and secure the entrance to the Metro station."
At 2:55 p.m., "The Schools Police representative in the Watch Center reports that MTA is closing the bus loop at Mondawmin; will keep the subway open."
At 3 p.m., the same representative "reports that MTA is now also closing the subway."