Q is for Quarry by Sue Grafton

Kinsey is asked to help two detectives from the Santa Teresa Police Department with a cold case. The detectives, Dolan and Stacey, have been with the department for many years and are in ill health. In 1969, a young woman was stabbed and her body dumped. The authorities were never able to identity her or the killer. Now, eighteen years later, Kinsey reviews the old files and works with Dolan and Stacey to interview old witnesses. Will a new set of eyes be enough to crack the case, or has too much time passed for a resolution?