Former police sergeant Drew Peterson claims his missing wife received a racy text message from another man a month before she disappeared.
The message could clear Peterson, who is a suspect in his wife's disappearance, his attorney told the Chicago Sun-Times on Thursday.
"Basically, what this shows is that Stacy had a secret lover," Joel Brodsky, Peterson's attorney, told the Sun-Times. "Who is this guy? Is he missing? If this person is missing, then the mystery is solved."
A message sent to Stacy Peterson's cell phone shows she was having an affair, Brodsky said. Peterson, a suspect in his wife's disappearance, denies any involvement and says she left him for another man.
"This investigation isn't all about trying to prove Drew did something wrong," Brodsky said. "There are leads out there that have nothing to do with Drew."
Authorities investigating the disappearance received the phone from Drew Peterson last month.
Stacy Peterson, 23, was reported missing on Oct. 29 after she failed to show up at a friend's house.
The text spoke of Stacy as "my love."
"You my love are the hottest bitch in the world. Thanks for ridding (sic) me like a bucking bronco last night," the message reads, according to Brodsky.
Brodsky and Peterson say they don't know who the man is who allegedly sent the message.
The Will County state's attorney's office declined to comment.
The Associated Press contributed to this report.