Mother Kills Two Sleeping Boys, Tries to End Own Life LOS ANGELES. Oct. 7. uV -Mrs. Hazel O'Brien, wife of Willis H. O'Brien, formerly of Oakland, a film technician whose work made possible the weird production "King Kong," shot and killed her two sons and then attempted to end her own life this morning, police reported. "My husband is not to blame in any way," Mis. O'Brien was quoted by police as saying after shqh'ad been removed to the Santa Monica Hospital for treatment of a bullet wound in her chest. "I just couldn't sleep and there was no one to leave the kids with." The two dead boys are Willis Jr., 13 years of age, and William W 14, who was blind. The tragedy took place in the palatial Westwood Hills home where Mrs. O'Brien lived with her two sons. She -has been separated from her husband for the last three years. Police said Mrs. O'Brien first entered the front bedroom and shot William, and then went to the Sleeping porch where she fired a bullet into the younger boy's bead. She then returned to her room and shot herself. She was found there after police had been summoned by neighbors who heard the shots. "I couldn't sleep," police quoted her as saying. Mrs. O'Brien has been in ill health for some time. The woman wtfs removed to the Santa .Monica Hospital and a charge of "suspicion of minder'' lodged against her by police. Couple Married I fere 16 Years Ago Mrs. Hazel O'Brien -is the estranged wife of Willis O'Brien, 47. of Oakland, son of the late William H. O'Brien, for IS years' assistant city attorney of Oakland. O'Brien, a famous motion picture technician, has two brothers and a sister in Oakland, Douglas L. O'Brien, architectural designer and Meredith F.. O'Brien, both of 58.1 Montclair Avenue, and Mrs. D. L. Walbridge. 765 Excelsior Avenue. Mrs. O'Brien and O'Brien were married 18 years ago, according to the brothers, who said that of late yean she has been "erratic."