Name: Biff Brown
Real Name: See above
Former Aliases: N/A
First Appearance: Deadly Duo #3 (Of 3) (Flashback)
Death Issue: Deadly Duo #3 (Of 3) (Flashback)
Cause of Death: Driven to suicide by Kill-Cat
Group Affiliations: N/A
Height: Around 6′
Date of Birth: Unknown
Place of Birth: Unknown
Base of Operations: Detroit, Michigan
Other Distinguishing Features: N/A
Marital Status: N/A
Known Relatives: N/A
Biff Brown created by Erik Larsen with help from Andy Smith.
Biff Brown was a business associate of Kill-Cat’s father, Walter Williamson. When Walter and Wilma were killed by boobytraps whilst on a safari, their young son blamed Biff for their deaths. He had himself been presumed dead by a trap but was saved by a local tribe and was transformed by magic and crude medicine, becoming Kill-Cat.
Kill-Cat returned to the United States and tormented Biff Brown for months, slowly tearing down his entire life. Kill-Cat finally confronted his hated foe and revealed his true identity as he explained his motives. Biff maintained his innocence before ultimately killing himself. It was only when these events were explained to the Kid Avenger that Kill-Cat realised that he may have been wrong the whole time and that Biff was innocent.