who is the heart eyes killer

The "Heart Eyes Killer" is actually a pair of married serial killers, David and Jeanine Shaw, who have been committing murders together across different cities in the United States, targeting couples on Valentine's Day. They disguise themselves with the Heart Eyes mask and have even recruited a fanboy accomplice to help carry out some of the killings. Detective Jeanine Shaw poses as a detective hunting the killer, while her husband David works undercover as an IT technician at the police department. Their motivation is a shared kink for killing together for fun. The couple is ultimately revealed as the true killers near the climax of the story, after Ally and Jay, the protagonists, initially believe they have caught the killer. David is the one who lost his wedding ring at one of the murder scenes, which was a clue to their identity