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Police departments would be required to turn on body cameras and keep the recordings for at least 30 days under a bill introduced Tuesday.

HB386, sponsored by Rep. Dan McCay, R-Riverton, seeks to set statewide standards for the use of body cameras and the retention of the recordings. McCay also plans to set up a series of grants to law enforcement agencies to equip officers with the cameras.

The bill would require law enforcement to wear the body cameras in a conspicuous location and officers to record encounters with citizens in an "uninterrupted manner."

It would require officers to use the body cameras when serving any warrant at a private residence. If an officer entered a home without a warrant, the officer would have to notify occupants he or she was using a body camera unless the homeowner asked that the camera be turned off.

The recordings would have to be retained by the law-enforcement agency for at least 30 days but no longer than 180 days. Those that might be used as evidence in a case would have to be kept for at least 90 days or until an investigation was complete, and those that were evidence in a criminal case would have to be kept until the case ran its course.

If a recording was altered or deleted, or if the officer failed to record an encounter in a criminal matter, juries and judges would be instructed to presume that the events that took place were favorable to the defendant.

A separate bill in the Senate being sponsored by Sen. Curt Bramble, R-Provo, seeks to define what recordings could be publicly released under Utah's open-records law. Another bill released Tuesday would set up a task force to study the use of force by police officers in the wake of several high-profile police shootings in the state and incidents across the country.

Twitter: @RobertGehrke