(Newser) – An Iowa man who claimed a masked intruder killed his parents and younger sister Tuesday morning has been charged with their murders. Police say Alexander Jackson called 911 from a Cedar Rapids home and said he had been shot in the foot while struggling with the intruder, the Gazette reports. The 20-year-old was treated in a hospital and taken to the Linn County Jail Tuesday night, reports the AP. He has been charged with first-degree murder in the deaths of 61-year-old Jan Perry Jackson, 68-year-old Melissa Ferne Jackson, and Sabrina Hana Jackson, 19. Police say the three bodies were found in different rooms of the home.