The officer himself had a issue. It was drinking. That and guns do not mix as most officers know.Sounds sorta odd a Grand jury would no bill such a incident depending on where your even from, and what the other side of the issue turned out to be.As a officer its impossible to judge based on only hearing 1 side of what happened.Sorry for your friend being killed tho.
And no off duty officers do not think they can just shoot people.They have the same responsibility as a on duty officer.If not more.Many lives and crimes have been saved and stopped due to a off duty officer being in a business that is being robbed because the criminals do not know they are there or armed.
Also you fail to realize how many officers get their lives or their families threatened for doing their job the correct way .Some departments require off duty officers to carry their duty weapons concealed for those 2 reasons alone.Your basically suppose to always be prepared to be called to duty or protect the people you are sworn to serve.That is why where i work we are not even allowed into clubs that serve alcohol anywhere in this county.If found to be in 1 its grounds for termination.And has happened a few times.