The 2002-2004 CBS-TV drama “Hack” starred David Morse as “a former police officer, Polish-American Mike Olshansky …who left the force after being charged with corruption and now works as a taxi driver in Philadelphia, Pennsylvania. The charges of corruption were never clearly proven but Olshansky, riddled with guilt, considers it his duty to make up for his past wrongs by helping those [people] the police will not help. Olshansky saves many lives and people by going above and beyond the call of duty, becoming a kind of heroic vigilante. He receives ‘inside’ help from within the police force from his friend Marcellus Washington, played by Andre Braugher, who often comes close to risking his own career.” More information is here: https://en.wikipedia.org/wiki/Hack_%28TV_series%29