SEATTLE -

The Seattle Police Department is launching a new advertising campaign on buses and billboards in hopes of generating tips about unsolved killings.

The Seattle Times reports that eight of the 23 homicides in the city this year remain unsolved, and there are about 60 dating back to 2000. Detectives hope publicizing the cases will prompt people to come forward with information and help eradicate a "no-snitching" culture that has hindered some investigations.

The ads, being unveiled Tuesday, each feature the photos of three or four of the 18 victims killed in Seattle since the beginning of 2010. Above the photos is a simple question: "Who Killed Me?"

ClearChannel Outdoor is contributing billboard space worth about $60,000. Titan Outdoor, the company behind the ads that will run on Metro buses, donated approximately $11,000 worth of work.