The Uno Killer is a 2023 short film about a mysterious man who goes around carrying UNO cards for fun and after committing each horrendous crime he leaves one behind as his signature token. The Uno Killer is a 2023 short film about a mysterious man who goes around carrying UNO cards for fun and after committing each horrendous crime he leaves one behind as his signature token. The Uno Killer is a 2023 short film about a mysterious man who goes around carrying UNO cards for fun and after committing each horrendous crime he leaves one behind as his signature token. The Uno Killer is a 2023 short film about a mysterious man who goes around carrying UNO cards for fun and after committing each horrendous crime he leaves one behind as his signature token.