It's hard to stump the staffers at Connecticut's historical landmarks — they're pretty well versed on their buildings' one-time occupants. But there's one common question for which they have no adequate answer: Is this place haunted? Very old buildings commonly come with lore about spooky happenings, but rarely does anyone really explore these tales. To that end, officials with Connecticut Landmarks have tapped the East Haven-based Connecticut Paranormal Research Investigators (CT-PRI, for short) to get to the bottom of things. Since May, the group has been schlepping its equipment — infrared cameras, temperature gauges, audio recorders, holy water — to four of the 12 properties maintained by Connecticut Landmarks. They concluded their on-site work last week, at Hartford's oldest building, the Butler-McCook House on Main Street. After reviewing the evidence, they'll put together their findings. [ Visit Website ]