Possibly but more likely you will end up arrested for interferring. Best hope here would seem to be a bunch of lawsuits with much publicity. In a tense situation, however comply with the cops, they had already shot one person they shouldn't have shot.
I am normally a police supporter but they aren't always right and will protect a fellow officer. Also, over time they get a really sour view of all humanity by the nature of their work.
I am very pro police too and I am sure the vast majority of them do their job honorably and well. It’s the few bad apples that sometimes give the rest of them a bad name.
“... and will protect a fellow office.” Therin lies the rub. How often and how many cops do this? When you protect criminals and you have a badge, you are one of the lowest forms of humanity on Earth, backed up by the power of the state.