Washington: The father of reporter Alison Parker, who was shot to death on Wednesday along with her cameraman while doing a live news piece, said on Thursday that he will not rest until the US has a way to keep weapons out of the hands of mentally ill people.

"I'm not going to rest until I see something happen. We've got to have our legislators and congressmen step up to the plate and stop being cowards about this," Andy Parker told CNN, saying in several other interviews that people who are mentally unstable must be prevented from obtaining guns