California’s gun laws are the toughest of any state in the nation, but they could not prevent this week’s East Oakland shooting that left seven people dead.

And short of banning semi-automatic weapons, it’s unlikely that any new laws could prevent someone from going on a shooting spree with the weapon that authorities say One L. Goh used to kill students at Oikos University. Even some of the most ardent gun-control advocates believe that’s the case.

“It wasn’t a failure of laws,” said Amanda Wilcox, who along with her husband, Nick, lobbies for the California chapter of the Brady Campaign to Prevent Gun Violence. “I just don’t see how our gun laws could have stopped something like that.”

Police say that Goh, a 43-year-old South Korean immigrant, used a legally purchased .45-caliber semi-automatic pistol. Police say they believe the gunman had four fully loaded magazines, each with eight rounds of ammunition. Under California’s assault-weapons ban, the maximum number of rounds allowed per magazine is 10.