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A motive remains elusive as investigators in Texas try to determine why a 30-year-old suspect in custody would have gunned down a sheriff's deputy while he was fueling his patrol car at a gas station near Houston.

Shannon J. Miles, 30, was charged Saturday in what authorities have described as an "execution-style" killing of 47-year-old Harris County Sheriff's Deputy Darren Goforth.

When a wispy-haired, septuagenarian senator from Vermont with a Larry David-style and a life-long passion for talking about income inequality decided to run for president, not many took him seriously.

That's especially true, considering that senator, Bernie Sanders, was going up against the New York Yankees of Democratic politics — the Clintons.

But now Sanders is gaining in the polls, including in the gold-standard poll in Iowa — out Saturday night.

On a Saturday morning, in a group of Rio de Janeiro's notoriously violent shanty towns, or favelas, heavily armed pacification police stand on one side of the street, on the other side, protestors call for them to withdraw.

On the protest side, Mayse Freitas lists the people she knows who have been injured or killed in shootouts in the area recently.

"I'm a mother and a grandmother," Freitas says. "I don't want my children or grandchildren to be next."

Oliver Sacks, the famed neurologist and best-selling author of books such as The Man Who Mistook His Wife for a Hat, died of cancer today in New York City at the age of 82, a long-time friend and colleague has confirmed.

The London-born academic's 1973 memoir Awakenings, about his efforts to use the drug L-Dopa to bring patients who survived the 1917-1928 encephalitis epidemic out of their persistent catatonic state, was turned into a 1990 Hollywood film starring Robin Williams and Robert De Niro. He was the author of a dozen other books.

Last November, voters in California overwhelmingly approved Proposition 47, which lets people with some nonviolent felonies petition a court to reduce their crimes to misdemeanors. And that has opened up new opportunities for many former offenders.

Take 21-year-old Sofala Mayfield, for instance. Mayfield's life began to fall apart in his teens, after his grandmother suffered a stroke and his mother fell back into drug addiction.

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