According to the City of San Marcos, police received a call around 11:35 a.m. on Monday, Nov. 13 about a person not breathing at the apartment complex located at 1651 Post Road.
"We are heartbroken by the death of Texas State University student and Phi Kappa Psi new member Matthew Ellis", said Phi Kappa Psi Executive Director Mark Guidi.
During a press conference on Tuesday, authorities said it is too early to tell if Ellis' death is a result of hazing.
Ellis is the latest of several students to die after parties while pledging fraternities this year.
Ellis was a business major at Texas State, according to his Facebook profile and the University Star, the school's student newspaper.
At the beginning of this year, four Texas State University fraternities were suspended after student, Jordin Taylor, 20, was found dead after a party at Cool River Ranch in Guadalupe County on October 29, 2016.
Joanne Smith, the vice president for student affairs, will oversee the review and ultimately "propose recommendations for reinstating fraternity and sorority chapters that demonstrate a commitment to the core values of Texas State and the ideals established by their respective national organizations", Dr. Trauth said. His body was sent to the Travis County Medical Examiner's Office.
Texas State University President Denise Trauth confirmed that a Phi Kappa Psi pledge died Monday after attending an off-campus fraternity event, and she announced an immediate suspension of all activities organized by fraternity and sorority chapters at the university while officials complete a review.
The Texas State Fraternity switched its Twitter account to private after Ellis' death.
No arrests have been made at this time. Trauth said the chapters aren't allowed to hold new-member events, chapter meetings, social functions and philanthropic activities.