Bill is a Miami resident Michael worked for during high school.
Bill originally hired Nate Westen $3,000 ($1,000 up front, $2,000 on job completion) to help find Jenna and make sure she was okay. When Nate was unable to find any viable leads, Nate asked Michael to help find her.
Unconvinced of the Westen brothers making progress finding Jenna, Bill took matters into his own hands to confront the Wilhelm brothers. When Bill was beaten by the Wilhelms, he decides to call the police. Michael and Nate stop him, eventually convincing the Wilhelms to give up their prostitution business and return Jenna home.
Bill still lives in Miami with Jenna.