9:09 p.m. April 2: A Red Line rider sees a passenger masturbating on the train and uses a cellphone to videotape him. The time and date stamp appear on the phone. The train was traveling from the Gallery Place station to Shady Grove.

April 3: The rider who shot the video reports the incident to Metro Transit Police.

April 4: A Metro Transit Police detective interviews the rider who shot the video and reviews train records, surveillance tapes and SmarTrip data to locate a suspect. The detective concludes that at least part of the crime occurred between the Friendship Heights station and the Medical Center station in Montgomery County.

April 6: The rider who shot the video is shown a photo array by Metro Transit detectives and identifies a photo of John P. Hicks.

10a.m. April 12: A woman riding the Red Line exits at Glenmont and tells a Metro employee that she was raped and assaulted at knifepoint on the train. Metro Transit officers respond and interview the woman, who is taken to a hospital.

11 a.m. April 12: A Metro Transit detective meets with the woman at the hospital and reviews Metro surveillance video and SmarTrip records to locate a suspect.

1 p.m. April 12: The woman is shown a photo array by Metro Transit detectives and identifies Hicks as her alleged attacker.

5:24 p.m. April 12: An arrest warrant is issued for Hicks in the Red Line rape investigation.

April 12: Hicks is arrested in the District in the rape investigation.

April 1 3: Metro Transit detectives seek an arrest warrant for Hicks in the April 2 indecent-exposure investigation. Warrant issued at 2:58 p.m.

1:27 p.m. May 20: Arrest warrant for Hicks on an indecent-exposure charge is served to him at Montgomery County jail, where he is being held on charges in the April 12 rape.

1 p.m. May 23: Hicks makes his first court appearance in Montgomery on charges related to the April 12 rape case and is ordered held without bond.

Source: Montgomery County court records