80s tv show/movie opening scene a marathon runner is decapitated

By 2017, the global economy has collapsed and U.S. society has become a totalitarian police state, censoring all cultural activity. The government pacifies the populace by broadcasting a number of game shows in which convicted criminals fight for their lives, including the gladiator-style The Running Man, hosted by the ruthless Damon Killian, where “runners” attempt to evade “stalkers” and certain death for a chance to be pardoned and set free.

A Las Vegas cab driver finds a million dollars of stolen money in his cab after his fare is murdered. Soon after, a ruthless hitman is in persuit; he will stop at nothing to recover the money and dispose of all witnesses.

An 80's throwback horror film about a TV Personality with murderous tendencies.