INVESTIGATORS ARE STILL TRYING TO COME TO GRIPS WITH THE CASE OF 15 YEAR OLD NEHEMIAH GRIEGO...CHARGED WITH MURDERING HIS PARENTS AND THREE YOUNG SIBLINGS AT THEIR SOUTH VALLEY HOME SATURDAY. SHERIFF DAN HOUSTON CALLS IT HORRIFIC. HE ALSO SAYS IT'S THE FIRST TIME HE'S BEEN AT A CRIME SCENE WITH THIS MUCH DISTRUCTION.

HOUSTON SAYS THE ONLY POSSIBLE MOTIVE THAT THE SUSPECT HAS GIVEN IS FRUSTRATION WITH HIS MOTHER. HE SAYS THE BOY USED BOTH A 22-CALIBER RIFLE AND AN AR-15 SEMI-AUTOMATIC WEAPON IN THE MURDERS.

INVESTIGATORS SAY THE SUSPECT'S BROTHER AND ONE OF HIS SISTERS WAS SHOT ONCE...WHILE THE OTHER VICTIMS WERE SHOT MULTIPLE TIMES.