Rapper Killer Mike won big at the Grammys on Sunday night in Los Angeles — but he left the awards show in handcuffs. The rapper and left-wing political activist won awards for best rap performance, best rap song and best rap album during the annual event’s preshow Premiere Ceremony, NBC News reported. However, before the sun had set, he was in handcuffs and being escorted out of Crypto.com Arena by the Los Angeles Police Department. Video of the arrest went viral on the social media platform X. Breaking: Rapper Killer Mike has been taken away in handcuffs in https://t.co/aF2yiyTHol arena afte…