Rex Heuermann was sentenced Wednesday to life in prison without parole.
Elena Katherine Moore, 39, had not been heard from since leaving a Planet Fitness in South Carolina nearly a week ago, according to police.
Attorneys for Luigi Mangione plan to present an "affirmative psychiatric defense" at his state trial, alleging he was suffering an "extreme emotional disturbance."
The submersible imploded on its 88th dive, killing all five on board who were on a deep-sea voyage to the Titanic wreckage on June 18, 2023.
One-year-old Kohen Wiley, his mother and a family friend were in the vehicle at the time, according to Ben Crump Law, which has been retained by the victim's family.
The Federal Reserve held interest rates steady on Wednesday as the economy weathers its highest inflation in three years.