should resulted in a criminal investigation against parents. the fact of this case are so egregious, it doesn't just impact me as a prosecutor and lawyer it impacts me as a mother. >> that was cnn's alexandra field reporting. harry lipman is a u.s. attorney and host of the talking feds podcast. he joins us from la jolla, california. thanks for being here. to start, how rare are charges in circumstances like this against the parents? >> it really depends on what you mean by like these. from looking around, i haven't seen charges like this against parents and, obviously, they sort of alarm people with thinking that now every time there's a rampant shooting they'll simply blame the parents. but that's really in my view a mistake and a way of looking at it. and i think you can run this analysis if the parents were,