Following is a timeline in the events surrounding the April 12 arrest of Freddie Gray, a black man whose neck was broken in police custody. Baltimore's top prosecutor announced charges Friday against the six officers involved in the arrest:

8:39 a.m. — Lt. Brian Rice, on bike patrol with Officers Garrett Miller and Edward Nero, makes eye contact with Gray, who is walking in the western Baltimore neighborhood where he was raised, and another person. Both run and the officers pursue them. After a foot chase, Gray surrenders about two blocks away.

8:42 a.m. — Police wagon requested. Gray is handcuffed behind his back and placed on his stomach. He says he can't breathe and requests an inhaler. Officers find a knife on Gray. Gray flails his legs and screams as they restrain him. He is loaded into the wagon without a seatbelt.

8:46:02 a.m. — Driver Officer Caesar Goodson believes Gray is acting irate in the back.

8:46:12 a.m. — The van makes its first stop. Rice, Nero and Miller remove Gray from the wagon, put flexcuffs on his wrists and shackles on his ankles and complete paperwork. They then put Gray on his stomach, head-first on the van floor.

8:54 a.m. — The wagon leaves for central booking. At some point after the van pulls away, Gray suffers a neck injury as a result of being handcuffed and shackled without being belted in, Baltimore State's Attorney Marilyn Mosby tells a new conference.

TIME UNKNOWN — The wagon makes a second stop. Goodson goes to the back of the van, but doesn't seek or give him medical assistance before continuing.

8:59 a.m. — Van makes third stop. Goodson asks for an additional unit to check on Gray. Officer William Porter and Goodson check on Gray. Gray asks for help, says he can't breathe and asks twice for a medic. Porter helps Gray onto the bench.

TIME UNKNOWN — Van makes fourth stop. Goodson and Porter respond to a request for additional units and are met by Nero, Miller, Porter and Rice. Gray is unresponsive on the floor. Sgt. Alicia White, who is investigating complaints related to Gray's arrest, speaks to the back of Gray's head, but he doesn't respond. A second prisoner is loaded into the wagon. Gray is no longer breathing.

9:24 a.m. — A medic is called. The medic determines Gray is in cardiac arrest. Gray is taken to Shock Trauma, where he undergoes surgery.

April 19: Gray dies a week after his arrest.

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Sources: Baltimore police, State's Attorney Marilyn Mosby.