Authorities can access cell phone location information without a warrant under law signed Monday

DENVER - Colorado authorities can access cell phone locations without a warrant in emergencies under a law signed Monday.

The measure requires phone companies to give authorities call locations in certain cases. Authorities would have to show that the time required to obtain a search warrant could put a person at risk. Law enforcement would have to show a court within 48 hours that they had probable cause after the fact.

Gov. John Hickenlooper signed the bill into law Monday.

Cellphone locations are already accessed under federal law or in state hostage situations. Supporters of the Colorado bill say the new law will clarify state law and allow the practice in cases where there's no hostage but a life is still in danger.