The girls' half-sister, 17-year-old Katlynn Goodwill-Yost, who was dating Felix, was away at the time. A shotgun-wielding Acosta, who was an Army private stationed at Fort Irwin at the time ...

Inside, police say, they found the bodies of Jennifer Goodwill-Yost, 39, her 34-year-old husband ... detectives learned that their 17-year-old daughter, Katlynn, was missing from the family ...

The girls’ half-sister, 17-year-old Katlynn Goodwill-Yost, who was dating Felix, was away at the time. A shotgun-wielding Acosta, who was an Army private stationed at Fort Irwin at the time ...