YouTuber Adam the Woo was found dead Monday in his home in Florida, the Osceola County Sheriff’s Office confirmed to HuffPost.

A spokesperson from the sheriff’s office told HuffPost that police found Adam “the Woo” Williams in his house Monday afternoon after a friend, who had borrowed a ladder, looked inside a third-story window and saw a man on the bed not moving. Officials entered the home and found 51-year-old Williams dead.

The investigation is ongoing, the sheriff’s office said.

Williams was a prolific YouTuber, largely known for his vlogs at Disney World and Disneyland.

Justin Scarred, a fellow YouTuber, mourned his friend, writing on Facebook that he is “devastated and lost.”