If I were a family member I would have filed a wrongful death civil suit against the security guard, as well as, a prosecutorial misconduct suit against the DA.
It has some other troubling aspects. I believe for example the security company that hired Dolloff lost their license to work in Denver because Of this shooting.
Something stinks.
Some people would do as you say.
Others would realize that people do things. That the results of are there own fault.