After actor Gene Hackman and his wife, Betsy Arakawa, were found dead in their Santa Fe home last month in what officials initially called "suspicious" circumstances, a thorough investigation has determined how they died, leading to a dire public warning.

Authorities in Santa Fe, New Mexico, say actor Gene Hackman died of heart disease, compounded by severe Alzheimer's disease, about a week after his wife passed away from a virus.

Residents mourning Mr. Hackman and his wife, Betsy Arakawa, are consumed by the unusual circumstances surrounding their deaths and why they were not discovered sooner.