💀 Murder on the dancefloor

It's the event of the year: The Anytown College annual dance. Your friends and you have been excited for the event for months. The night finally draws near, and you enter the bustling gymnasium, where the dance takes place. You socialize with your friends, have some drinks and dance a little. Suddenly, the power goes out, followed by a scream. As the lights turn back on, you see a fellow student lying dead on the dance floor, covered in blood, with no killer to be seen. Panic ensues as faculty ushers all the students out of the gymnasium. You're informed that the authorities are on the way, and they'll be interviewing all students to discover who the murderer is. Can you pinpoint the killer without becoming a suspect yourself?