SANTA ANA – A 12-year-old boy dabbed at his eyes with tissue Tuesday as he testified about seeing his younger brother hit, starved, left home alone and forced to sleep on the floor. Gabriel Morales propped his head on his hand and told a jury about how he saw a man he called his “Dad” hitting younger brother Brandon Morales “every day” on his chest, legs, back and head during the spring of 2008.  The man he pointed out as “Dad” is Alberto Solis Guzman, 29, his mother’s live-in boyfriend who is on trial for murder in the May 30, 2008 death of Brandon Morales, who was 4 when he died of massive head injuries. Deputy District Attorney Larry Yellin contends that Guzman and Gabriela Mariana Morales, the boys’ mother, are equally responsible for killing Brandon, the youngest of three children.