article_snippet: Boyfriend locked the terrified girls in a room and tied the door shut so the terrified girls could not leave, it is alleged.
article_snippet: Officials then found the three 'imprisoned' girls.
article_snippet: During an interview with police, the nine-year-old girl apparently told officers that the nine-year-old girl sister had killed officers parents.
article_snippet: the nine-year-old girl said the nine-year-old girl had heard two gunshots while Martinson and the nine-year-old girl father were upstairs.
article_snippet: It is believed that one of the girls was the 911 caller who alerted authorities to the alleged attack.