Harold Henthorn was sentenced this week to life in prison on a murder conviction for the 2012 cliff-pushing death of his wife at Rocky Mountain National Park, The Associated Press reported.
U.S. District Judge R. Brooke Jackson on Tuesday imposed the mandatory sentence against 59-year-old Henthorn.
Henthorn's second wife, Toni Henthorn, plummeted 130 feet in a remote, rocky area of the park in September 2012. Harold Henthorn had taken her there to celebrate their 12th wedding anniversary.
Prosecutors say he wanted to collect $4.7 million in life insurance policies she didn't know existed.
Authorities continue to investigate the death of Henthorn's first wife, who was crushed when a car slipped off a jack while they were changing a flat tire in 1995. Henthorn hasn't been charged in that death.