Bill Wade, the outgoing chair of the Coalition of National Park Service Retirees, said Congress should be regretting its decision.
"The many congressmen and senators that voted for the legislation that allowed loaded weapons to be brought into the parks ought to be feeling pretty bad right now," said Wade.
Wade called Sunday's fatal shooting a tragedy that could have been prevented. He hopes Congress will reconsider the law that took effect in early 2010, but doubts that will happen in today's political climate.
Calls and emails to the National Rifle Association requesting comment were not immediately returned on Monday.
The NRA said media fears of gun violence in parks were unlikely to be realized, the NRA wrote in a statement about the law after it went into effect. "The new law affects firearms possession, not use," it said.
The group pushed for the law saying people have a right to defend themselves against park animals and other people.
And how many people were murdered in National Parks prior to enacting the law? More than enough.
This guy wasn't carrying legally, as he had already shot 4 people outside of the National Park. He had body armor with him for Pete's sake.