They just mentioned that residents as far away as 26th and Graham talk about seeing spirits, especially those of children, in their house. (I live closer to the cemetery than that. Eek.) There also have been reports of evil spirits roaming around. They're saying it's an active, restless place.
From the KUOW website (note that there's not actually a dog park there):
At 2:50 p.m. – The Comet Lodge Cemetery
Land is hard to come by in the Seattle area, but this isn't a new problem. Beginning in 1927, parts of Comet Lodge Cemetery were sold off. More than 800 people were buried at this Beacon Hill site. Now, there are only about 20 gravestones left. Houses stand on old burial plots and there's even a dog park on cemetery land. Mercedes Yeager runs Market Ghost Tours in Seattle's Pike Place Market. And she just learned about the Comet Lodge Cemetery recently, including stories of hauntings that so many nearby residents talk about. She shows Jeannie Yandel around what's left of the cemetery.
The KUOW page links to an old post I made about the cemetery, here.