Contracted security officers used Mace on attendees at a DMX concert Wednesday at Lambda Chi Alpha fraternity, according to an IU Police Department investigation. The contracted security company was not sanctioned by IUPD or the University, said IUPD Capt. Jerry Minger.

However, police still don’t know the identity of the specific organization or person that used Mace on the first couple rows of the audience. Some attendees are considering pressing charges against whoever used the Mace.

Representatives from Lambda Chi Alpha did not return the Indiana Daily Student’s calls by press time.

At the time of the event, no IUPD officers were hired to help with security, Minger said. The concert was scheduled to end at 9:30 p.m. and Lambda Chi Alpha were supposed to have amplified music turned off by 10 p.m., he said. Nyle Washington, a representative for DMX, said DMX was not notified of the city’s noise ordinance.

Channel 13, the NBC affiliate in Indianapolis, provided video footage of the event to IUPD. The department examined it and discovered that security not related to IU ran on the stage. The security officers looked like police because they were dressed in duty uniforms with gun belts and appeared to be wearing weapons on them, Minger said. Eventually, the contracted security officers sprayed the audience with mace, he said.

“I didn’t get directly sprayed, but we were coughing,” said sophomore Alli Germain, who was in the seventh row of the crowd. “It had just drifted onto us. He definitely sprayed the front row, though.”