In an earlier statement, the police department said a 23-year-old man was present when officers responded to a report of a gunshot victim Friday. A woman, later identified as Welsh, had been shot multiple times and was dead when officers arrived, police said.
"Through investigation, it was determined that leading up to the shooting, an altercation had occurred between the two," police said.
The killing took place on the 100 block of Whitewater Street, about a mile east of the school's main campus, at a residence listed on a university web page as off-campus housing.
Welsh was a business management major from Plainfield, Illinois, who won an individual national title on the vault for the gymnastics team last year, according to the school.
She was a vault “phenom” who holds four of the eight highest vault scores in team history, the university's athletic department said in a statement Sunday.