On his Facebook page, 13-year-old Zachary Proper appears shirtless, flexing for the camera with a goofy grin and his baseball hat askew.

Today, he is in the Venango County Jail, charged with two counts of criminal homicide in the deaths of his grandparents, Dorothy Fross, 67, and George Fross, 69.

Police said the middle schooler sneaked up behind his grandmother and shot her dead, then gunned down his terminally ill grandfather, emptying the gun into him as he lay wounded on the kitchen floor Sunday, upset that they had insulted his mother.

Read more: https://old.post-gazette.com/pg/12285/1268384-455.stm#ixzz28y9OgHkL