The initial installment of John McMahon's police procedural series follows a genius, socially awkward leader and a special team of FBI investigators who reinvent methods of finding their culprit in a smart, intriguing, and satisfying mystery. Head Cases  tracks FBI agent Gardner Camden (who has a brilliant analytical mind but is interpersonally awkward) and his group of agents in the Patterns and Recognitions (PAR) unit. A recent murder victim's DNA matches a long-dead serial