In the mid 1970s in Seattle, Washington The University Towers Hotel suffered a series of arson fires. It wasn't until the next year when the fires started up at a local hospital instead of the hotel that the firebug would finally be caught.
Sources for this episode:
Fatal Friends, Deadly Neighbors, and Other True Cases by Ann Rule
BizJournals.com - University Tower given new identity: Hotel Deca
HistoryLink.org - Edmond Meany Hotel (1930-1931)