At the meeting , Dean O ’ Dell ’ s wife ask the ex @-@ husband to give their son a bone marrow transplant . Meanwhile , Sheriff Lamb ( Michael Muhney ) arrest Weevil for the robbery . Veronica visit Weevil in prison before she decide to look into a pizza delivered to Weevil ’ s house . Sheriff Lamb tell Keith that the ex @-@ husband have disappeared before accusing Keith in the ex @-@ husband ’ s disappearance . Keith think that Dean O ’ Dell was involved in the disappearance , but when he visit Dean , it turn out that Dean 's wife and stepson have disappeared to a hospital in Mexico , presumably taking the ex @-@ husband with them . Wallace visit a “ tutor ” , who give him a mysterious “ study guide ” before going back to for the “ answers . ” Veronica notice the masks being used in a short film , but they was stolen . When they are in Mexico , Dean O ’ Dell reveal that he lay to Keith about their whereabouts .