GOLETA (AP) — A man whose son was among the victims killed in a rampage near a California university quaked with grief and rage as he described his “lost and broken” family and the proliferation of guns he believes led to his son’s death.

Police said Saturday that 20-year-old Christopher Ross Michael-Martinez was the last of six people killed by suspect Elliot Rodger near the University of California, Santa Barbara before the gunman apparently shot and killed himself.

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Michael-Martinez’s father Richard Martinez says he talked to his son, a sophomore at UC Santa Barbara, just 45 minutes before he was killed.

The father choked back tears as he talked to reporters before a news conference, saying “When will this insanity stop?”

Martinez then shouted “we should say to ourselves ‘not one more!’ ” before dissolving into tears.

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He blamed politicians and the National Rifle Association for allowing guns to be so accessible.

All the guns used in the attack reportedly purchased legally in the Santa Barbara area.

CBS2/KCAL9 reporter Greg Mills said all of the seven injured are expected to pull through.

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