An extradition request filed this week in Los Angeles claims Bruce Beresford-Redman hit his wife Monica Burgos in the head with a metal tube, bat or stick and then choked her to death before dumping her body in a hotel sewer, reports CNN.
Prosecutors claim the murder was premeditated, saying the couple had been dealing with serious marital problems.
The 438 pages of documents include e-mails between Beresford-Redman and his alleged mistress and evidence that he had racked up a $5,000 phone bill to a sex hotline. Prosecutors also say Monica had threatened to take the couple's savings if she wasn't granted a divorce.
Beresford-Redman, who maintains his innocence, was arrested in November and is now fighting extradition from a jail cell in Los Angeles.
A previous complaint filed by prosecutors offered other chilling allegations about the couple's conflicts in the weeks, days and hours leading up to Burgos's death.