Spencer Morrill believed he was in a relationship with the singer and that she was hiding messages for him in her songs.
Was the singer unknowingly taking counterfeit pain medication?
Roberts had left the band in 2012, due to problems with blood circulation and other health issues.
He is remembered by his ex-wife Kate Van Buren.
The ‘Hello’ singer had been due to play the Talking Stick Resort Arena in Phoenix on Wednesday night (August 17th).
Taylor Swift and boyfriend Tom Hiddleston reportedly spent the weekend together in Rhode Island after some time apart.