The Blue Knights
A group of super powered vigilantes who took inspiration from the original Blue Knight from the early 1970s and were active in the mid 1980s.
They killed the Robber Barons in an attempted bank robbery which was captured on video and shown on Rough Justice. A few days later they outed Street Angel at the Bakerville Street Fair and attempted to bring him in for his crimes during his partnership with Black Velvet.
One member can fly and turn invisible. Another member could levitate and telekinetically control objects. Another member wielded a sword, while the other two appear to just harbor guns.
The newspaper headline Blue Knight Implicated in Slayings from the Fall of 1983 may be the work of the group.