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.

READ MORE: Federal Court Strikes Down Judge’s Order To Provide Housing To All Skid Row Homeless

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.

READ MORE: Smokey Southland Skies Caused By Wildfires Burning In Northern And Central California Spur Air Quality Concerns

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.

MORE NEWS: Father Memorializes Son, Who Died In 2019 Conception Boat Fire, Along Last 500 Miles Of 2,600 Mile Hike

(Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)