The Oscars paid tribute to Gene Hackman Sunday night, days after he and his wife Betsy Arakawa were found dead in their New Mexico home.

Forensic pathologist Dr. Michael Baden shared his theory on the "unusual" circumstances that may have led to the deaths of Gene Hackman, his wife Betsy Arakawa and their dog.

Gene Hackman and his wife Betsy Arakawa tested negative for carbon monoxide after they were found dead at their New Mexico home on Feb. 26, per police.