What is a "dead person living in heaven"? Are they dead or not?
Twisted Rome teaching used to support keeping it's membership in bondage... and the Vaticans coffers flowing with funds from the many who purchase catholic idols.
Scripture is clear we are not to attempt contact with the departed......they do not have a spirit which moves on earth..unlike Christ who moves thru His Holy Spirit on our behalf. However demons do masqurade as "angels of light"...because it works to deceive the uninformed.