Martin Kaste

After the chaos of terrorist attacks, the U.S. spent billions to update first responder radio systems. But the newer gear can still be overwhelmed — as it was in the school shooting in Parkland, Fla.

Wednesday's mass shooting at a high school in Florida has renewed interest in something called "gun violence protective orders." This is legislation that would allow authorities to take guns away from from people who are believed to be at risk for violent behavior and only a few states have them.

America's emergency alert system expects local authorities to warn the public in case of a ballistic missile attack. Some wish the feds would cut out the middle man.

Prosecutors and law enforcement in the Seattle area have embarked on a new anti-violence strategy: Make sure the people who've been ordered to give up their guns actually do so.

Nuclear civil defense fell out of favor in the latter years of the Cold War. But, as North Korea builds its nuclear arsenal, local officials are reluctant to bring it back.

When a drug-sniffing dog alerts, it usually gives police the right to conduct a search. But how do you know a drug-sniffing dog actually detected the scent of something illegal?

Recent mass shootings have shown how law enforcement can fail to prevent attacks by people who are known threats. The system is limited in what it can do, but there's also room for improvement.

Gory arrest scenes captured by smart phones and police body cameras are threatening the noble "Rin Tin Tin" image of police dogs.

Devin Patrick Kelley was charged with domestic violence while serving in the Air Force. He was sentenced to confinement for a year. Authorities are now investigating whether he could legally buy a gun.

Authorities are investigating the background of Sayfullo Saipov, the man accused of driving a truck through a bike path in New York City. The act of terror in lower Manhattan killed eight and injured 11.

Baltimore's stubbornly high murder rate is causing some residents to lose faith in efforts to change policing in the city. They say it has become an excuse for police inaction.

As law enforcement officers try to learn how to identify potential shooters, the people who study this kind of violence say this is being driven partly by the attention the media pays to it.

Law enforcement confirms the Las Vegas shooter had multiple rifles equipped with devices to enable guns to fire very quickly, as well as spy cameras to watch for approaching police.

Authorities say that so far a motive for the shooting is elusive. He also doesn't fit any common profiles for a mass murderer. One thing that is known, is that Paddock had a lot of weapons.

The FBI's crime statistics for 2016 reveal an increase in violent crime. Homicides, in particular, continue to grow, and the increase looks less and less like a mere statistical blip.

The coordination of disaster response efforts by the federal government has significantly improved since Hurricane Katrina. In Florida, reviews of the federal response have been positive in the wake of Hurricane Irma.

We have the latest on cleanup efforts in Miami in the aftermath of Hurricane Irma.

The White House is deep in the midst of a tax overhaul push. Also, we look at the damage from Hurricane Irma and Russia's investigation of a watchdog group called the SOVA Center.

The Trump administration has lifted Obama-era restrictions on military donations of equipment to local police. The move was denounced by critics of "police militarization."

Police crowd control measures are under scrutiny after a series of political protests. Officers must strike a balance on whether to act or hold back as protests become more contentious.