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AUSTIN (CBSDFW.COM/AP)The University of Texas received a complaint about a fraternity’s portrayal of Hispanics at a party a year before the same fraternity came under scrutiny for a similar party earlier this month.

Records released to The Associated Press show a complaint contends that members of Phi Gamma Delta wore “stereotypical Mexican clothing” like sombreros, ponchos and mariachi outfits to a party at their house.

What the university did in response wasn’t immediately clear.

The complaint was filed electronically in January 2014 with the Campus Climate Response Team, part of the school’s Office of Diversity and Community Engagement.

The fraternity threw a similar party February 7 and more than 20 people complained following that gathering. The Office of the Dean of Students is investigating that event to see “whether or not it was freedom of speech, whether or not it was hate, whether or not it was a violation (of school rules).”

Fraternity President Andrew Campbell has apologized, but could not immediately be reached for comment Thursday.

(©2015 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)