Sheriff Sam Crish declined to say what evidence led to the doctor's arrest on Monday.
According to a sheriff's report at the time, Wangler called emergency responders to the home early on the morning of Sept. 4, 2006. He said he woke to the sound of a carbon monoxide alarm and attempted to wake his wife, Kathy Wangler, but she was not responsive.
Wangler remarried about a year later. A message seeking comment was left Tuesday with Wangler's attorney.
He faces a Sept. 29 pretrial hearing.
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