As People reported, Sean died of complications from an infection, and his father, Matt Milliken, confirmed news of his son's death in a Facebook post. "Sunday he was having problems with his breathing, they were able to resuscitate him and a short time later his heart stopped," Matt wrote at the time.
Elsewhere, TLC also paid tribute to the former "My 600-Lb Life" contestant. "TLC is saddened to share that Sean Milliken has passed away. TLC expresses its deepest sympathies to Sean's friends and family at this difficult time," the network said in a statement.
The year before his death, Sean appeared in an episode of "My 600-lb. Life: Where are They Now?," during which he opened up about losing his mother. "She passed away a couple weeks ago and I'm devastated, and I don't know what to do now because my mom was everything to me," he told cameras during the episode (via USA Today).
