With his not-Andy powers of mind control, Sam walked into the middle of a wedding ceremony and forced everyone in attendance to watch as he played a fatal game of lie detector at the alter. He questioned the bride and groom, digging for any reason to prove that they really weren't truly in love. For a long while, even with the usage of mind control, Sam was unable to find anything worthy of shattering their loyalty to one another. They were in love. Undeniably so. In his frustration, Sam changed course and turned to their relatives. He slowly tortured and killed them off one by one, eventually giving the couple the option to choose between personally murdering one or the other in exchange for the safety of their family and friends.
In the end, it was the bride who gave in first. She took the knife that Sam gave her and stabbed her husband in the heart.
Even though Sam let the survivors go, as promised, it was discovered that the bride had committed suicide shortly afterward.
News reports are linking this massacre to the one that took place at the theater. The police and FBI are working to find the person responsible, but they've come up short-handed, as Sam made sure those who survived couldn't remember his face before he left.