A 17-year-old from Willmar that is being called the “mastermind” in the brutal murder of his grandmother made a brief appearance in court on Thursday. Robert Warwick is 1 of 3 Willmar teens charged in the strangulation and stabbing death of 79-year-old Lila Warwick. Robert Warwick is charged with 2nd-degree murder as a juvenile, but will be back in court later this month to possibly be certified as an adult. He allegedly hatched the plan to kill the elderly woman over a belief that she had a safe containing $40,000. Warwick has reportedly admitted to giving his grandmother’s garage code to 19-year-old Brok Junkermeier, who allegedly carried out the murder while 16-year-old Devon Jenkins stood watch. They both remain in custody as well, and also could be tried as adults pending certification hearings.