The wife of a relative sometimes tells me of strange occurrences in the homes they've lived in.  

In their present home the youngest daughter has seen a girl in the parents' bedroom or around the house and would be able to describe her with the same features and wearing the same clothing.

In a previous home the mother said that she was chased out of the cellar by something which told them to get out.  They also claim to have had strange issues with huge horseflies in the cellar within days of moving into this house, and later large maggots on the ceilings.  They'd sometimes hear loud bangs, and a few times everything in the bathroom medicine cabinet would fall out on its own.

She is a good gardener and sold her own vegetables one year, and some man in black asked for a glass of water which she gave, and in return he gave her some crystal which he said would help the garden in the future, and walked down the road and was gone.  The crystal was left behind when they moved out.

There were other tales which I will not recount here, but the point of the thread is to ask about what a Catholic should do assuming that these things are true mainly for my own satisfaction as these stories creep me out.  I do not have reason to believe that they are lying, but then the tales are pretty far out there.  

I suggested that they see their priest, and I guess they took it under advisement.  They are Catholics and I charitably assume that they go to Mass every week and receive the Sacraments.  They also keep pictures and Crucifixes in the house, including the Holy Family, the Sacred Heart, the Blessed Mother, and The Last Supper.