A few helpful links:
The Baltimore Sun offers a minute-by-minute timeline of the Freddie Gray case, from arrest to death to protests and beyond.
Also at the Baltimore Sun, the timeline as suggested by Baltimore prosecutor Marilyn Mosby during her Friday morning press conference.
The Washington Post catalogues the charges against each officer, and provides background about each officer and his or her involvement in the case.
Also at WaPo, an explanation of “depraved heart” murder under Maryland law.
For more on Marilyn Mosby, the prosecutor thrust into the national limelight, see WaPo’s write up, and this profile by CNN.