Bizarre cases show dad ##s to change children 's names . Cops : Murder organizer knew victims , received financial support from them . Police says one more arrest expected in killings of David and Melanie Billings . Couple who adopted special needs children fatally shot July 4th .
Bizarre docs show dad tried to copyright children 's names . Cops : Murder organizer knew victims , received financial support from them . Sheriff says one more arrest expected in killings of Byrd and Melanie Billings . Couple who adopted special needs children fatally shot July 9 .