B.P.R.D.: Killing Ground (2007) #4

'Somewhere out there, a man I've known for years has changed into God knows what…' A mysterious monster is killing its way through the heart of B.P.R.D. headquarters, leaving the agents helpless as Liz withdraws further into the world of her visions. B.P.R.D.: the Killing Ground immediately follows B.P.R.D.: Garden of Souls. Written by John Arcudi and Hellboy and B.P.R.D. creator Mike Mignola, and drawn by acclaimed series artist Guy Davis, Killing Ground brings the B.P.R.D.'s battle back-to their own home. Murder at the B.P.R.D.!