Sebastian, a 15-year-old boy with autism, vanished from his Hendersonville, Tennessee, bedroom on Feb. 25, after his mother put him to bed, said police.
Responding officers found Kara, a national title-winning athlete, suffering from multiple gunshot wounds.
Kenderson Hill, 64, was last seen alive leaving his Albany, Georgia, neighborhood on foot Saturday around 3:45 a.m. local time, according to investigators.
Arielle was last seen leaving her Fort Myers, Florida, residence Wednesday evening, according to the Lee County Sheriff's Office.
