It was the third time Karlson had been tried on the charges. The first trial ended in a hung jury, and a guilty verdict in the second was overturned on appeal.
Karlson also faces retrial on child endangerment charges for allegedly taking sexually suggestive photos of a 15-year-old girl.
He spent about 1½ years of a 17-year sentence in prison before the convictions were overturned last August. He's to be resentenced on Sept. 21.
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