Linda and Stottlemeyer continue dating until the season 6 episode "Mr. Monk and the Bad Girlfriend", when Stottlemeyer is planning to propose to her during their shared trip to Hawaii. However, shortly before they leave, Linda's former business partner Sean Corcoran is shot and killed by a shotgun-wielding assailant while showing off a house to a couple. Monk and Natalie take the case, but they are both alarmed when they uncover a large amount of evidence that leads them to suspect Linda is the killer: from a photo of her in her office posing with her late grandfather with a twelve-gauge shotgun, they realize she owns a weapon similar to that used in the murder. They also discover that she has an obvious motive – that Sean was preparing to start his own company and would take a lot of Linda's clients with him – and she is the same height as the killer, has a key to the house, and even wears the same shade of lipstick that a witness described the shooter as wearing. Unfortunately, they have a hard time convincing anyone else, especially Stottlemeyer, that Linda killed her partner.