Qualified immunity for officers firing into car after car chase, as the chase was dangerous, the driver continued to verbally threaten them, and a recent carjacking had been armed, leading the police to think that the driver was armed.
http://www2.ca3.uscourts.gov/opinarch/172228p.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.