Fallen (Will Trent #5) Karin Slaughter

Special Agent Faith Mitchell returns home to a nightmare.

Her baby daughter has been locked outside, and there's a trail of blood leading to the front door. Inside a man lies dead in a pool of blood and Faith's own mother is missing.

When the Atlanta police arrive, Faith has some difficult questions to answer. But she also has some desperate questions of her own.

What were the killers searching for?
And where is her mother?

Now, Faith's work partner, Will Trent, must piece together the fragments of a brutal and complicated case, and catch a murderer with only one thing on his mind.