"My name is Kenneth Chamberlain. This is my sworn testimony. White Plains police are going to come in here and kill me."

And that's just what they did.

In the early hours of Saturday, Nov. 19, 2011, U.S. Marine veteran Kenneth Chamberlain Sr. accidentally hit his LifeAid medical-alert pendant, presumably while sleeping. The 68-year-old retired corrections officer had a heart condition, but wasn't in need of help that dawn. Within two hours, the White Plains, N.Y., police department broke down his apartment door and shot him dead. Chamberlain was African-American. As with Trayvon Martin, the black teen recently killed in Florida, there are recordings of the events, recordings that include a racial slur directed at the victim.

On the rainy night of Sunday, Feb. 26, 17-year-old Trayvon Martin walked to a convenience store in Sanford, Fla. On his way home, with his Skittles and iced tea, the African-American teenager was shot and killed. The gunman, George Zimmerman, didn't run. He claimed that he killed the young man in self-defence. The Sanford Police agreed and let him go. Since then, witnesses have come forward, 911 emergency calls have been released, and outrage over the killing has gone global.

On Sept. 21 at 7 p.m., Troy Anthony Davis was scheduled to die. I was reporting live from outside Georgia's death row in Jackson, awaiting news about whether the Supreme Court would spare his life.

Davis was sentenced to death for the murder of off-duty Savannah police officer Mark MacPhail in 1989. Seven of the nine nonpolice witnesses later recanted or changed their testimony, some alleging police intimidation for their original false statements. One who did not recant was the man who many have named as the actual killer. No physical evidence linked Davis to the shooting.

Death brings cheers these days in America. In the most recent Republican presidential debate in Tampa, Fla., when CNN's Wolf Blitzer asked, hypothetically, if a man who chose to carry no medical insurance, then was stricken with a grave illness, should be left to die, cheers of "Yeah!" filled the hall. When, in the prior debate, Gov. Rick Perry was asked about his enthusiastic use of the death penalty in Texas, the crowd erupted into sustained applause and cheers. The reaction from the audience prompted debate moderator Brian Williams of NBC News to follow up with the question, "What do you make of that dynamic that just happened here, the mention of the execution of 234 people drew applause?"

The death penalty case of Mumia Abu-Jamal took a surprising turn this week, as a federal appeals court declared, for the second time, that Abu-Jamal's death sentence was unconstitutional. The 3rd U.S. Circuit Court of Appeals, in Philadelphia, found that the sentencing instructions the jury received, and the verdict form they had to use in the sentencing, were unclear. While the disputes surrounding Abu-Jamal's guilt or innocence were not addressed, the case highlights inherent problems with the death penalty and the criminal justice system, especially the role played by race.

As President Barack Obama made his public appearance with Turkish President Abdullah Gul on Monday as part of his first trip to a Muslim country, U.S. federal agents were preparing to arrest Youssef Megahed in Tampa, Fla. Just three days earlier, on Friday, a jury in a U.S. federal district court had acquitted him of charges of illegally transporting explosives and possession of an explosive device.

Obama promised, when meeting with Gul, to "shape a set of strategies that can bridge the divide between the Muslim world and the West that can make us more prosperous and more secure."