May 22, 2012 — Alleged gunman James Holmes purchases a Glock pistol from a nearby retailer. A week later, he buys a shotgun. A week after that, he buys an AR-15.
June 10, 2012 — Holmes withdraws from the neuroscience program at the University of Colorado where he has been a student for one year. According to officials, it’s a 5- to 7-year program.
July 2, 2012 — Holmes makes an online purchase for clothing, which includes ballistic items.
July 7, 2012 — Holmes purchases another pistol.
July 19, 2012 — Holmes purchases a ticket to see “The Dark Knight Rises” at Century Aurora 16 for the midnight show.
Friday, July 20, 2012
12:05 a.m. — The midnight screening of the newest Batman movie starts on screen No. 9 at the theater.
12:15 a.m. (Estimate) — Loud techno music starts playing at Holmes’ apartment at 1690 Paris St.
12:35 a.m. (Estimate) — Holmes dons the body armor and arms himself with the AR-15, shotgun and a pistol and opens fire on the theater.
12:39 a.m. — Hundreds of calls come in of shots fired at the movie theater.
12:41 a.m. — Officers on scene. Eventually 200 respond.
12:43 a.m. (Estimate) — Holmes is taken into custody near the rear of the theater.
2:15 a.m. — The first officers arrive at Holmes’ apartment, where he told them he had several explosives.
3:15 a.m. — Police Chief Dan Oates addresses media for the first time.
11 a.m. — Oates again addresses the media, this time joined by Gov. John Hickenlooper and several other leaders. He identifies Holmes as the suspect in the shootings.
4 p.m. — In a third media briefing, Oates says Holmes’ apartment building and four others nearby have been evacuated.
5:35 p.m. — Holmes is booked into Arapahoe County Jail on first-degree murder charges.
Saturday, July 21, 2012
11:47 a.m. — Police defuse the first explosive in Holmes’ apartment.
2 p.m. — FBI Agent James Yaccone says the explosives in Holmes’ apartment are some of the most sophisticated he has seen.