when he was in the air force on 2012 he was convicted on two counts of domestic assault on his wife and stepson. he was sentenced a year. and he was never entered into what was phone as the national criminal information center database, meaning by federal law he could have been prevented from purchasing or owning any sort of weapons. anderson, the defense department say that they are launching an investigation. >> one of the families, the hol comes they lost eight members of their family. i know you spoke with surviving family members. i can't imagine what they are going through right now. >> reporter: yeah, we spoke with them earler today at their farm. yesterday as you can imagine was the worse day of their lives. i spoke with the son of brian hole come, scott hol com. he lost his brother along with other family members.