New Mexico medical investigators estimated Arakawa died Feb. 11, but she appeared to have contacted the clinic the next day, a sheriff's official said.

More details -- including an altered timeline -- are emerging as officials continue to investigate the tragic deaths of actor Gene Hackman and his wife, Betsy Arakawa, who were both found dead in their Santa Fe, New Mexico, home in February. Here's the timeline of the case: "Last Days of Gene Hackman" airs Tuesday, March 18, at 10 p.m. ET on ABC.

Authorities have discovered new information changing the timeline of when they believe Academy Award winning actor Gene Hackman and his wife, Betsy Arakawa, died. The couple were found dead in their New Mexico home last month with officials saying the pair had been dead for some time before they were discovered by neighbourhood security.