Ask your doctor about Nexium. We're back reporting. All across America one in three neighbors on average has guns and a lot of parents trying to hide them. I keep it in a closet far, far back, where... See More
Ask your doctor about Nexium. We're back reporting. All across America one in three neighbors on average has guns and a lot of parents trying to hide them. I keep it in a closet far, far back, where there's no way that she could climb up and get to it, at least at this point. I do have a high-powered rifle that's all back in here. You can't even see it. Reporter: To help educate parents on ways to conceal their guns, companies run videos like theses, guns concealed behind a secret panel behind clothing in a closet, in a hollowed-out bible. And in so many houses a lot of children who think they know exactly where the guns are. We have a shelf up top and I think that's where it is. I know where all of them are in the house, I'm pretty sure. I think I probably could find it. Reporter: The NRA turned down our repeated requests for an interview but recommends that guns should be stored, unloaded, until they're ready for use and making sure that they're not accessible to a child. But, the question for individual parents tonight, what is really inaccessible? David Muir was there with Stephanie and her 4-year-old josh. She gets a surprise twice. She tells us that josh never pays attention and didn't know she had a gun in the corner of the bedroom. It was on the side. Reporter: But josh makes it clear he knew all along. It's here somewhere. How big is it? How big is mommy's gun? Is it big? Have you seen it? Reporter: In fact, he takes us right to the corner where the gun used to stand. I'm curious. Are you surprised that he knows you have a gun? Yeah. Reporter: So what happens a month later? Stephanie now sure the gun is really hidden on a top shelf in her bedroom closet. We check in. Josh once again is playing with his toy guns and, once again, his mother is wrong. Reporter: Where are your mom's guns? They're in the closet. Can you show us where the gun is? Yeah. It's up there, mom. Reporter: Josh asks for a flashlight to point out the huge pump action shotgun. It's up there. I can't reach it. Up there. Why did you move it? To keep it safe. You don't want anybody to take this gun? I don't want anyone to touch it. Reporter: Stephanie says at least the gun is unloaded. And, again, that question, do you really know what your child can do when following their curiosity. We've seen the pictures on youtube of children climbing refrigerators, impossible gymnastics to get what they want. Do you think a lot of people out there are just living in denial? Yes. Because I would have said the same thing, that would never happen to us. Reporter: Advice from deputy sheriff mark Easter. 14 years in law enforcement. Honored as officer of the year. He and his wife parents of an enchanting little boy, a 3-year-old named Michael, called "Little man." Well, it was his cool man walk, was what the word started out as, because he just, he walked into a room. He had a strut. He just, yeah, he did. He had a strut. It's just those certain people that just have that light about them, and he just, he just did. Reporter: Because policemen really do get threats, officer Easter decided to store a loaded gun on top of a five-foot dresser in the parents bedroom. It was there the whole time his girls were growing up and little Michael never came in that bedroom to play. Was almost always, I no touch a gun. I no touch a gun. Reporter: And you thought it was out of reach? Yes, absolutely. Yes. A five-foot-tall dresser. I'd always preach to him, you know, we never touch daddy's gun, do we? No, we never touch daddy's gun. Reporter: But, last March, officer Easter was five minutes out the door leaving for work, when his wife calls. The sheer terror that she was portraying I knew something horrific had happened. Reporter: His wife was just a few feet from the room where Michael never goes to play. You were right in the other room? Here I am just trying to clean up dinner, doing my, uh, check of the house, making sure the front door's locked and I didn't realize he walked right past me and had gone into our room and I come around and I heard the -- the shot. Reporter: Do you know how he got up to the top of the dresser? We don't -- they don't even know. What it looked like. And then, I guess I already know that for the few seconds he was alive afterward, I got to say good-bye to him and that I loved him, and, you know, I was the first one to hold him and I was the last. Reporter: Michael was buried in his favorite outfit -- a police uniform. He was the only 3-year-old little boy that I knew that would grab you with both hands, by your face, "Daddy, look at me, look at me," and he'd grab my face and say, "I love you." Reporter: This is the first time the easters have spoken publicly. And they say they can do it for only one reason. And we're trying to do the best that we can to honor his memory and maybe we can help somebody else to avoid this tragedy, so they don't have to go through what we do. Reporter: What is your dream the day after people see this on TV? I just urge one family to go out and buy a safe. You're -- you're basically rolling the dice with your children's life. Look.
This transcript has been automatically generated and may not be 100% accurate.