Are there any instances in the Old Testament of a person receiving genuine visions, and then later turning to lies and fabricating visions?

There's an instance in the history of one church in particular where it's held that one man had genuine visions from God, but that at a later point in his life after having been excommunicated he continued receiving "visions". The members of this church will genuinely hold that his earlier visions were true and his later visions were false. I'm curious if this sort of story has an precendence. Obviously the later lies of visions would normally put into question any of his previous visions, in my estimation - if he shows a proclivity about lieing about visions *now*, why would God reveal things to such a dishonest man earlier? If his visions previously **were** genuine, what could make a man capable of receiving genuine revelations turn into such a dishonest man? I'm thinking there could perhaps be some clues in similar stories from the Old Testament (or in Christianity I suppose), so I'm searching for similar stories.