Denver • A man who was previously convicted of fatally shooting a University of Utah student has been sentenced to life in prison without parole for killing a Colorado man.

Austin Boutain was sentenced Thursday for the death of 63-year-old Mitchell Ingle, of Golden, in October 2017. Boutain pleaded guilty in September to murder and aggravated robbery.

Prosecutors say he and his wife, Kathleen, were drinking and smoking marijuana with Ingle in an RV park when Boutain became angry at Ingle's suggestion the three have sex. Boutain slit Ingle's throat and burglarized his trailer.

The couple then drove Ingle’s vehicle to Salt Lake City, where student ChenWei Guo was shot to death.

Austin Boutain also was sentenced to life in prison, and his wife to one year, for Guo’s death.