Martin Kaste

Martin Kaste is a correspondent on NPR's National desk. He covers law enforcement and privacy, as well as news from the Pacific Northwest.

In addition to general assignment reporting in the U.S., Kaste has contributed to NPR News coverage of major world events, including the 2010 earthquake in Haiti and the 2011 uprising in Libya.

Kaste has reported on the government's warrant-less wiretapping practices as well as the data-collection and analysis that go on behind the scenes in social media and other new media. His privacy reporting was cited in the U.S. Supreme Court's 2012 United States v. Jones ruling concerning GPS tracking.

Before moving to the West Coast, Kaste spent five years as NPR's reporter in South America. He covered the drug wars in Colombia, the financial meltdown in Argentina, the rise of Brazilian president Luiz Inacio "Lula" da Silva, Venezuela's Hugo Chavez, and the fall of Haiti's president Jean Bertrand Aristide. Throughout this assignment, Kaste covered the overthrow of five presidents in five years.

Prior to joining NPR in 2000, Kaste was a political reporter for Minnesota Public Radio in St. Paul for seven years.

Kaste is a graduate of Carleton College, in Northfield, Minnesota.

The ambush-style murder of Sheriff Deputy Darren Goforth at a gas station in suburban Houston on Aug. 29 has added new urgency to warnings about a growing "war on cops" in America. After the arrest of the suspect, an African-American man named Shannon J. Miles, the local district attorney called for more public support for law enforcement.

The phrase "police militarization" conjures up an image of cops wrapped in Kevlar, barging into homes with semi-automatic weapons. But familiar as that image is, we don't know how common it is. There are simply no good statistics on police tactical operations in America. The federal government doesn't keep track, and neither do the states — with one exception: Utah.

When Washington state legalized recreational marijuana, people wondered if it would mean more stoned drivers on the roads. Two and a half years later, one trend is clear: Police are arresting more drivers with pot in their systems — but what's not clear yet is what that means for traffic safety.

American college campuses are increasingly patrolled by armed police officers — and it's a trend that burst into public view Wednesday, when a University of Cincinnati officer was charged with murder in the shooting death of a black motorist during a traffic stop. But this arming of college cops is causing some worries.

When prosecutor Joe Deters announced the indictment of University of Cincinnati Officer Ray Tensing on Wednesday, he had harsh words about the officer's competence, saying he should never have been a cop.

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The case of Sandra Bland has raised anger and suspicions nationwide since she was found dead in a jail cell in Hempstead, Texas, two weeks ago. Bland's family and supporters have rejected the medical examiner's finding of suicide, and the criminal district attorney for Waller County, Texas, says he's recruited two outside lawyers to assist in the investigation of her death. The local investigation has been reviewed by the FBI, and local prosecutors have pledged to bring the case to a grand jury next month.

You know what a pain it can be storing and organizing the millions of videos you've shot on your smartphone. Now imagine you're a police officer, and you wear a body camera every day.

Police cams have suddenly become a big business. In the months since Ferguson, share prices for the camera manufacturer Taser International have doubled. But in the long run, the real money is in selling police a way to store all that video.

Law enforcement officers have come under pressure over the past few months to rethink how they use deadly force, as a result of the string of videos of shootings by police.

But recently, police have been talking about another video — one that shows an officer not shooting.

The surprise announcement of criminal charges in Baltimore Friday morning definitely got the attention of police officers. The decision has been welcomed by protesters, but it's causing dismay for law enforcement across the country.

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Bob Ball is a real estate investor in Portland, Ore., but that's just his day job. For the past 20 years, he has also been a volunteer cop.

"When I was new, it was the best time of my life. I got to go out there and wear a white hat and help people and make a difference in my community, one little piece at a time," Ball says. "That's a very, very fulfilling thing to do."

This is real police work. On one occasion, Ball had to pull his gun on a guy threatening a woman with a knife.

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On Valentine's Day weekend, Jonathan Hutson found himself exchanging tweets with somebody unpleasant: a Holocaust-denying anti-Semite, by the look of things.

Then Hutson looked up the person's earlier tweets. This guy was tweeting about shooting up a school. He said that he wanted to execute 30-plus grade-school kids."

So Hutson decided to draw the person out — "engage with him," as he puts it — to see if the threats were real.

Late last month, during a meeting of the St. Louis Board of Aldermen, a shoving match broke out among members of the public — some of them off-duty police officers.

The cause of the tension was a proposal to create a new civilian oversight authority for the police. Advocates of police reform like civilian oversight, but police officers say the boards are often politicized and unfair to them.

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Wearable video cameras are fast becoming standard-issue gear for American police. The cameras promise a technological answer to complaints about racial bias and excessive force.

But in fact, the beneficial effects of body cameras are not well-established yet. And the police departments that rushed to buy them are now dealing with some unintended consequences.

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Since the Ferguson, Mo., shooting, there have been renewed calls for police departments to hire more minority officers, but it turns out it's not that simple.

Police in the U.S. are more diverse than they were a generation ago. In the 1980s, 1 in 6 officers belonged to an ethnic or racial minority. Now it's about 1 in 4. The challenge these days is finding enough recruits to keep that trend going.

In order to reach what Alaskans call "The Bush" — villages isolated across tundra — you'll need a bush pilot. That's where John Bouker comes in.

Most of Bouker's passengers are civilians he transports to and from Alaska's remote villages. He does his job with the nonchalance of a suburban dad in a minivan dropping his kids off at the mall.