Having reviewed you narrative/story I find a glairing problem you created for yourself !!!
First statement by you) I'm a cop and my last civil litigation
involved a guy i had at gun point during a felony traffic stop
Second and later statement) Officer Du Ma
conducted a felony traffic stop with gun out.
??? So at what point was the guy at gun point and for what reason
Lets look at the Constitution !!! That pesky thing that officers take an oath to whether they mean it or not !!! It does give at least guidance if not the law !!!
Amendment IV (1791)
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated,
and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
Its been agreed upon that authority to act requires a warrant or probable cause !!!
We know there was no warrant naming a specific person !!!
While you had reasonable suspicion to make the stop is without question !!!
I say you did, anyway !!!
Everyone is most likely familiar with a police line up where a witness is brought in to identify a suspect !!! That is essentially the position you were in out on the street !!!
You lawfully activated your emergency equipment and pulled the guy over !!!
He pulled over and didn't try to flee !!! That's in his favor !!! He acted the way he was supposed to as a reasonable person should !!! ( using the legal fiction of a court, "a reasonable person" standard)
??? How do you get probable cause !!!
You start an investigation !!!
Sounds like you did that and as you say, "Turns out the driver and vehicle were not the BOLO subject." You never got probable cause or you would have arrested the guy !!!
At some point without probable cause you pointed a weapon at the guy !!!
You accosted a member of the public freely going about his business and in a reckless and heedless manner placed him at gun point !!! Under the Use-of-Force Continuum you went from Officer Presence to Lethal Force without probable cause !!!
??? Can you explain how and why that happened
The Constitution does not grant that authority to anyone !!! End of story !!!
The ball is in your court !!! Respond !!! Comply, reply and obey !!!
You know the deal !!!
Normally I would read the Maranda Warning here !!! You would be well advised to make use of the 5th amendment and remain silent !!! Or you can confess to the crime as is your right to do !!! In reality you pretty much did that when you posted your story of the encounter !!!