Stream San Diego News for free, 24/7, wherever you are with NBC 7. After the crash, investigators said Chavez approached the boyfriend and stabbed him; he then struck the 22-year-old woman driver. A witness told NBC 7 the male passenger hit Chavez first, but prosecutors did not indicate if that was the case. A truck crash in Carlsbad turned violent, leaving a man stabbed and a woman assaulted before CHP arrested a suspect. Prosecutors say Chavez has a prior conviction from 1998 for assault with a deadly weapon.