Mystery continues to surround the airplane crash that killed the husband of Dorsey & Whitney partner Katherine Demarest last week, damaging the firm’s office building in Anchorage, Alaska.

Local media reports say Doug Demarest was the sole fatality in the Dec. 29 crash. Demarest was piloting a Cessna 172S when it clipped the building that houses Dorsey’s Anchorage office before hitting a second building.