Easy Target by David Grace
Approx. 140,260 words.
Published on September 17, 2009.
NYPD Lieutenant Greg Webster retired to teach at a small Kansas college but before even a year had passed his wife was killed in an apparent hit-and-run accident. Greg suspected nothing sinister but one of his students thought Carolyn's accident might be the latest in a series of murders. Apparently, the serial killer wanted a tougher opponent than the campus cops. Big mistake.