The Scarecrow by Michael Connelly

Los Angeles Times reporter Jack McEvoy gets downsized by his newspaper but is determined to end his career with a great story. He latches onto the story of a white girl killed in a black neighborhood, which turns out to be the work of a serial killer (or killers?). McEvoy teams up with FBI agent Rachel Walling to track down the killer--who turns out to have formidable resources and technical skills. The Scarecrow is a decent thriller and a good summer read.