Not much is known about Freddy Allen's days before he became a Sexual Investigator. He served in the U.S. Navy, and won the Navy Cocksucking Championship three years in a row. Thanks to a very angry vampire, Cassidy, he got most of his teeth punched out. This was, naturally, a mixed blessing.
He likes to tinker with machines, and seems to enjoy the work of a Sexual Investigator, a business he started with Bob Glover. Together they traffic in drugs, hunt down missing persons, and take whatever other sex-related jobs they can find.
It's not what he wanted to do with his life, and he'd probably be happy doing something else. But, in his words, "You learn to settle for what you can get, don't you?"