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Knox County deputies will soon have a new tool to help them preserve evidence. The department is shopping for body cameras for officers, and gave a demo Tuesday.

Sheriff J.J. Jones said he's considering several types including chest mounts, sunglass cameras, and collar cams. He wants to buy about 50 at first, and will assign the units to patrol.

The purchase includes data storage, so the video is available to prosecutors as evidence.

"If they go in a house, if they're searching a building, if they're in a foot pursuit -- the camera goes with them. So you will actually get the same perspective that the officer sees, which we think is certainly valuable," he said.

Sheriff Jones did not have a price estimate at this time. He expects to start the bidding process for the cameras in the next few weeks.

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