Dan Rivera — the paranormal investigator who labored for the Annabelle haunted doll tour — informed individuals round him he wasn’t feeling nicely simply hours earlier than his premature dying in Pennsylvania … TMZ has realized.

Adams County Coroner Francis Dutrow tells us … Dan was surrounded by coworkers Sunday morning — however, they parted methods when he informed them he was sick and wanted to return to his room to relaxation.

We’re informed these coworkers hadn’t heard from him shortly, in order that they went to test on him … which is after they discovered him useless.

Dutrow tells us EMS was referred to as, however they could not do something to assist after they arrived. The official post-mortem outcomes will not be prepared for a pair months.

As we informed you … Rivera died in Gettysburg, Pennsylvania Sunday whereas on tour with the “haunted” Annabelle doll, which impressed the eponymous 2014 movie. Lorraine and Ed Warren — the OG investigators of the doll — declare the doll has a “demonic” presence.

Regardless of Dan’s dying, the New England Society for Psychic Analysis introduced the tour will proceed on.

Rivera was 54.