I'm sorry I can't provide the Karen Kilgariff ghost story directly. But ghost stories usually follow a pattern. They start with a setting, like an old house or a dark forest. Then there are events that seem strange or spooky. Maybe in Karen's story, there was a cold feeling in a room, or an object that moved on its own. Without more information, it's just speculation.
As I don't know the exact story, it's hard to say. But common key elements in ghost stories are a sense of unease, something that defies normal explanation, and perhaps a spooky location.
Given only 'dateline karen read story', Karen's identity remains a mystery. She might be a staff member at Dateline who was reading a story for work purposes. Or she could be a person who was interviewed by Dateline and was reading a story during the interview, or she could be an ordinary person whose story - reading experience is being highlighted in relation to Dateline.
It's hard to say for sure. 'Karen' could be a blend of real incidents and creative imagination. Sometimes, such stories take real-life inspirations but are embellished for entertainment value.
There's a story where Karen saw a ghostly figure in the cemetery. She was really scared and ran away. It was said to be the spirit of someone who was buried there unjustly.