Why are police radio communications in the U.S. open for the public to hear? Some say this creates a weakness when confronting terrorist attacks, but others say it's important for police transparency.
Among many privacy issues debated in the courts and Congress is whether law enforcement officials should be able to know someone's whereabouts, as recorded by cellphone towers, without a warrant.
Silicon Valley firms, human rights nonprofits and other groups have filed legal briefs in support of Apple's defiance of an FBI order. Some San Bernardino victims' families have filed in opposition.
Since the protests in Ferguson, Mo., police departments have rushed to adopt body cameras. But local laws governing their use are all over the map. See the laws in your state.
The question of whether tech companies should be required to build backdoors has been floating around Congress for years. A public fight over the San Bernardino terrorism case could break the logjam.
Blood alcohol levels match well with a person's impairment. But the THC in marijuana doesn't move around the body the same way, so blood tests can miss people who are stoned.
Prosecutors and some police departments in the state say reducing prison sentences is having an undesired outcome: more property crime. But reform advocates say police are jumping to conclusions.
The road to a U visa is long, and difficult to navigate. Proposed rule changes in New York City may streamline the process, and provide a model for other law enforcement agencies around the country.
The new effort could help save animals — and, perhaps, people: Research shows that animal abuse is often a precursor to acts of violence against people.