Driving

Can the cops put a GPS device on your car and track you for weeks without a warrant? That's what they did to DC club owner Antoine Jones. Now, after a federal appeals court sided with Jones, his case could be headed for the Supreme Court.

As the clock ticks toward election day, the battle over Proposition 19 in California is heating up. This week, law enforcement spoke out for marijuana legalization.

Everybody's got an opinion on why Prop 19 lost. The Chronicle examines what a range of movement leaders and other thinkers think it means -- and what the discussion of why Prop 19 lost itself means.

A former Michigan sheriff turned Republican legislator has introduced a bill that would allow for the roadside drug testing of suspect drivers.

Two extreme cases from Texas demonstrate why legislation to protect medical marijuana patients there is badly needed.

Medical marijuana is legal in California, but you have a problem if you have to go through any Border Patrol checkpoints. The Department of Homeland Security isn't the Department of Justice, and DHS doesn't recognize medical marijuana.

A federal appellate court in Washington, DC, has trimmed law enforcement's wings a little in an important Fourth Amendment case.