there for generations to keep on killing. they say the obama administration is less than forthcoming about their son s death. no one told us anything. but you know about the case? what happened to my son is what we know. zapatas hired former u.s. assistant attorney martinez to find out. the family would like answers and closure. a gun at the crime scene purchased near houston on behalf of accused drug dealer barba. the other by a dallas trafficking wing that included buyer osorio. police arrested carnet espinoza for killing zapat and wounding his partner avilla as they drove along a dangerous mexican highway. we understand there is a written directive for agents not to get on the road because it s dangerous. i m shows the atf in dallas had evidence to bust the osillo ring three months
formally withdrawing that letter because built contained so many inaccuracies. bill: what were some of those that we have found, william? reporter: number one burke and the atf claimed that jaime avilla the man you see here was not a suspect when he bought the guns that killed agent brian tere raoerbgs therefore the atf could not have stopped him. that is inaccurate. atf s own document show that avilla was a suspect 46 days before he bought the guns used in terry s murder, and the u.s. attorney and the atf knew it woeupb 24 hours of brian s death. secondly the letters say that the atf did not guns illegally go to mexico, that is not true. agents watched those guns be bought, they watched them on camera, get stacked into a garage and show up in mexico within days and they did not stop them from buying them more. nevertheless listen to how inch dig interest in u.s. attorney burke was that grassley even suggested they let guns walk,
reporter: drew took over his dad denny s route when denny retired last july. denny helmer said he is proud to see his son pick up where he left off. i actually trained him to be my sub, when he first started. he did it a few times. he said this is cool. a neat job. reporter: denny knows how his son feels, because denny took over the same route from his dad dale, when dale retired after 40 years. and dale took over the route from his dad, charles helmer, when charles retired after 43 years. in fact, a helmer has delivered the mail in avilla, indiana, nonstop for 110 years. it s kind of a neat feeling. my dad did it. grandfather did it. now my son is basically doing the same route. makes you feel warm inside, you know. reporter: do you ever when you are here feel your dad or grandfather or your great grandfather looking down at you and making sure kind of funny. i think about it on the route.
call this toll-free number now. stop, oh, yes, wait a minute mr. postman i love the music department here. oh, they re good. they re good. they nail it every time. finally, this half-hour, going postal. of course this time we don t mean that in a bad way. not at all. one family has been doing it in rural indiana for more than a century. wpta s eric olsen reports. reporter: another day at the avilla post office. the mail carrier drew helmer is preparing for the day just as his father denny did 40 years before him. this is dad s route when he worked here. this is where he stayed. if he would come to the post office you would find him in this little area here.