tarango was 18 years old.chenko was hired as a security guard watching for shoplifters. >> we just going do get some food and leave and wasn't going to be that big of a deal. >> reporter: tarango says he waits outside in his car as his friends went in to steal food and in the next few moments, kosatschenko and a second security guard gave chase, a scuffle broke out. they ran. tarango threw the car in reverse. kosatschenko opened fire. >> i just heard -- when i heared gunfire, i looked back and felt the glass shatter and felt a slight push like somebody had pushed me over. >> reporter: tarango admits he should have never been there. it turns out kosatschenko should not have been working as an arounded guard there, either. he had a criminal record as a juvenile. in fact, he had several run-ins with the juvenile system. when he was 13 he pled guilty to two counts of aggravated assault. he was deemed a felon and a juvenile delinquent. the court placed him on probation and made him a prohibited possessor. meaning h

tarango was 13 years old and kosashanko the security guard. >> we were going to get food, leave, not deal. >> reporter: he waited in his car after his friends went to steal food and the next moments, the security guard gave chase, a scuffle broke out. his friends ran. threw the car in reverse. kasachanko opened fire. >> i seen the glass shatter and felt like a slight push, somebody had pushed me over. >> reporter: tarango admits he should have never been there. it turns out kosashanko should not have been working there either. he had a criminal record as a juvenile and several run-ins with the juvenile system. 13, he pled guilty to two counts of felony assault and deemed a felon at a juvenile delinquent and made him a prohibited possessor. he lost his right to bear arms, at least until he turned 30. even with all that information, we discovered the arizona department of public safety never checked his record. captain steve entaman. >> this guy's juvenile records apparently weren't checked. where was the breakdown? >> arizona does not require juvenile records to be reported on this pa