and competitive. and you couldn't tell her no. and if you tried to, she would say, "watch me." and i loved that about her. and i miss that about -- i miss that so much. >> reporter: one thing that haunts her parents, who are gun owners themselves, is that they never asked if there was an unsecured gun in her friend's house. >> maybe if i would have just asked that question, maybe things would be different. i'd still have my daughter. >> we're trying to prevent accidental childhood shootings. >> reporter: brooklynn's parents started an organization, the brooklynn mae mohler foundation, dedicated to promoting responsible gun ownership. >> we're just trying to prevent this from happening. if you're a gun owner, be responsible. there's no excuse. yeah, it's a gun lock. lock your guns up. and if you're not, and you -- even if you're just a parent, ask where your children go, if they have unsecured weapons in the home. >> i just want to make sure that no other parent ever has to feel