Reading police related shooting threads over the years, it seems to me libertarians care more about loosening poison control regulations than anything related to the militarized police, voter suppression or systematic racism. Always defending the cop. No wonder 99% are white Christians or atheists who think being atheists makes them persecuted.
Most self-identified libertarians are socially apathetic, irreligious Republicans that care more about taxes and gun rights. Rarely, do I meet libertarians that strongly condemn the police state, advocate near open-border, or criticize hawkish foreign policies.
Based on my experience in other forums, true libertarians rarely vote much or when they do, they actually vote for the libertarian candidate, instead of picking "the less evil" Republican candidate. True libertarians are a very rare breed. That said, the cop is not culpable in this case.