I would not want to be wrong on proclaiming someone to be either in heaven or hell!
However, my friend Ronnie, five years ago, was an alcoholic crack cocaine addict. He had been on a binge for some time, both high and drunk. He was living in a camper shell off the back of a pickup truck, having no other home. He was arrested on an outstanding warrant and spent time in jail. As he de-toxed, he was in a deep, trance-like sleep for what may have been more than 24 hours. During the course of that time, he received what he describes as a vision of hell. It was absolutely terrifying, with demons doing with him as they pleased. The abuses were unnatural and dehumanizing, violating not only his body, but his spirit. The Lord also revealed to him that this was his eternity, with no hope, if he did not repent of his sins.
When he woke up, he was an emotional mess, crying uncontrollably for some time. When he was released, he began to search for God. This lead him to many different groups and non-C churches. As he puts it, “I was born again three times!” Finally, after not being fulfilled with the experiences he had, he reverted to the Catholic faith of is youth. He was able to make a tear-filled confession and felt the graces coming upon him. The miracle of this is that all desire for either alcohol or crack cocaine were GONE. Not a hint of desire. According to Ronnie, the Lord advised him that he would be forever lost if her returned to those addictions. Instead, he returned to the church with a vengeance, and attends a local clean and sober club, telling all who will listen about the goodness and mercy of the Lord. He has sheltered them and taken them to mass. He now has a job with a company truck, a home, is an EMHC at church. I usually see him at adoration. His life is a walking miracle. I praise God for what He has done with this formerly lost soul. There was celebration in Heaven at his repentance.
So, yes, some people are given private revelations, or visions of hell. But, he was there alone. Just him and the demons, which I think is a more accurate reflection of the horrible reality of hell.
Christ’s peace be always with you.