Series information from Fantastic Fiction.

"For Meg Jennings and her K-9 companion, Hawk, exploring the ruins of a deserted building is an exciting way to sharpen their skills without the life-or-death stakes they face as part of the FBI’s Human Scent Evidence Team. But deep in the echoing rooms of an abandoned asylum, Hawk finds the body of an elderly woman. Before forty-eight hours pass, Meg learns of more cases of elders found dead in neglected urban structures. It will take the expert coordination of her whole team to stop someone who has operated in the dark for so long." -- Amazon.com.