It wasn't self defense, it was ruled a homicide. But they can't charge him because he died December 12, 2019 from a pulmonary embolism. Besides killing Charles Vallow, Investigators also believe that Alex Cox played a role in killing Lori's children.
In the Netflix documentary about Lori Vallow, Alex Cox is seen admitting that he shot his brother-in-law, Charles Vallow—and saying it was self-defense.
www.newsweek.com
What Happened to Alex Cox?
In September 2021, more than two years after Alex Cox killed Charles Vallow, the shooting was ruled a homicide.
Alex Cox was never charged in connection with Charles Vallow's death—because he died himself a few months after the shooting. Cox died of natural causes on December 12, 2019. He was 51.
In 2007, Cox attacked Joseph Anthony Ryan Jr, Lori's third husband,
ABC News reported. Ryan was Tylee's father and the adoptive father of her first son, Colby.
Cox tasered Ryan and threatened to murder him. He pleaded guilty in a Texas court and was sentenced to 90 days in prison and five years' probation.
“Alex Cox said that he kind of took it upon himself to protect Tylee and Colby, and that he had attempted to take Joe's life,” April Raymond, Vallow’s friend, said.
The investigation revealed a much darker tale beyond the missing kids.
abcnews.go.com