The Deseret News reports that 56-year-old Martin MacNeill was arrested Friday and booked into the Utah County Jail.
MacNeill faces murder and obstruction of justice charges.
Investigators have long thought that MacNeill killed his wife in April 2007 then covered it up - charges the doctor has denied. He claims he had nothing to do with his wife's death.
Michele MacNeill's body was found in a bathtub in the couple's Pleasant Grove home.
An autopsy indicated she died of natural causes, but a 2010 addendum to that report questioned the manner of death. Authorities now say they believe Michele MacNeill was drugged by her husband.
Information from: Deseret News
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