Signs of Life (HB) - Hardcoverby Creston Mapes (Author) Rogan Sneed . . . Portland's Worst Nightmare High school teacher Tyson Cooper is just dismissing his class when a student flashes his phone. "Another shooting, Mr. C." And this one is too close to home. Tyson races to Pioneer Square . . . but he's too late. The light of his life has been snuffed out and so has his faith. Veteran Portland Police Investigator Wayne Deetz, two years shy of retirement, is charged with leading the