Shadow of the Monarch (2017) online

A seemingly homeless man who catches butterflies in the park witnesses a gangland shooting. He's dragged off into a tunnel to be killed, passes out only to awaken to a bloody nightmare - The cops rule it a drug deal gone bad releasing the Butterfly Man. Soon the CIA is on their doorstep looking for a rogue psychopathic agent who disappeared 15 years ago and the only person who has possibly seen him is the Butterfly Man