Anderson Cooper looks at how the confrontation between police and Kenneth Chamberlain escalated before he was killed.

CNN's Soledad O'Brien reveals police video of an incident that resulted in the shooting death of a retired marine.

The son of a retired marine who was shot and killed by police says there was officer misconduct despite the court ruling not to indict.

Marissa Alexander, a 31-year-old mother of three, is facing a mandatory 20 years behind bars. She had pinned her hopes for freedom on a motion for a new trial; that motion was denied Thursday in a Florida courtroom.

In late April, Alexander spoke to CNN as an inmate in the Duval County Jail in Jacksonville, Florida. "This is my life I'm fighting for," she said while wiping away tears. "If you do everything to get on the right side of the law, and it is a law that does not apply to you, where do you go from there?"

Alexander is referring to Florida's "stand your ground" law, a law that has come under scrutiny since the killing of Trayvon Martin. Unlike the Martin case, which involved one stranger killing another, Alexander's case involved her gun and her abusive husband.

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Thirteen are charged in connection with FAMU drummer Robert Champion's death, but none face manslaughter charges.

CNN's Randi Kaye looks at the charges against 13 people in the death of Florida A&M drum major Robert Champion.

Robert Champion's mother talks to Anderson Cooper about charges against thirteen people in connection with her son's beating death on a FAMU marching band bus.

CNN's Tom Foreman looks at the strange details surrounding the death of an elderly D.C.-area socialite. Her husband, 44 years her junior, is accused of murdering her.

Editor's note: Don't miss Gary Tuchman's interview with Marissa Alexander at 8 and 10 p.m. ET tonight on AC360°. 

Marissa Alexander, a 31-year-old mother of three, pleaded for her freedom as an inmate in the Duval County Jail in Jacksonville, Florida.

"This is my life I'm fighting for," she said while wiping away tears. She added, "If you do everything to get on the right side of the law, and it is a law that does not apply to you, where do you go from there?"

Alexander is referring to Florida's so-called 'stand your ground' law, a law that has come under scrutiny since the killing of Trayvon Martin. Unlike the Martin case, which involved one stranger killing another, Alexander's case involved her gun and her abusive husband.

On August 1, 2010, she said her husband, Rico Gray, read text messages on her phone that she had written to her ex-husband. She said Gray became enraged and accused her of being unfaithful. "That's when he strangled me. He put his hands around my neck," Alexander said.

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Jeffrey Toobin explains the John Edwards trial hangs on how Edwards thought the money was supposed to be used.