Generate a question that has the following answer: Sir Karell Borotyn for the following movie plot: Sir Karell Borotyn (Holmes Herbert) is found murdered in his house, with two tiny pinpoint wounds on his neck. The attending doctor, Dr. Doskil (Donald Meek), and Sir Karell's friend Baron Otto (Jean Hersholt) are convinced that he was killed by a vampire. They suspect Count Mora (Bela Lugosi) and his daughter Luna (Carroll Borland), while the Prague police inspector (Lionel Atwill) refuses to believe them. Borotyn's daughter Irena (Elizabeth Allan) is the count's next target. Professor Zelen (Lionel Barrymore), an expert on vampires and the occult, arrives in order to prevent her death. At the same time, secrets are revealed surrounding the circumstances of Sir Karell's death.
Who is found murdered in his house?