Barquin Arozamena, a Spanish native, was a Big 12 champion and Iowa State's female athlete of the year.
Police have charged Collin Daniel Richards, 22, with first-degree murder.
Richards had lived in small towns throughout western Iowa, residing with his mother, father and grandparents at various times.
Police found bloody clothes belonging to Richards, but DNA test results had not been returned yet, Huff said.
A homeless man attacked and killed a top amateur golfer from Spain who was playing a round alone near her university campus in central Iowa, leaving her body in a pond on the course, police said Tuesday. Officers found Richards with several scratches on his face consistent with fighting and a deep laceration in his left hand that he tried to hide, it said.
As Barquin's colleagues began grieving the loss of a talented teammate and classmate, Richards was ordered jailed on a $5 million cash-only bond at the county jail and facing the rest of his life in prison.
Iowa State football coach Matt Campbell spoke about the death during a meeting with the media on Tuesday.
That man told investigators Richards had said recently he had "an urge to rape and kill a woman" while they were walking near the course, the complaint said.
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She was described as "one of the most accomplished players in Cyclone golf history", in reference to the name for the university's sports teams. She was the third Iowa State women's golfer to compete in the U.S. Women's Open Championship.
"We will never forget her competitive drive to be the best and her passion for life", Martens said. Instead, the team will wear helmet decals with Barquin's initials to honor her. Even though she completed her eligibility as a golfer, she was remaining in Ames to finish her degree in civil engineering.
Swedish golfing great Annika Sorenstam called the murder "horrendous", as she posted a picture of herself alongside Barquin after she won the 2018 European Ladies' Amateur Championship in Slovakia in July. Soon he was back in Ames, arrested weeks later after being found passed out at a liquor store and admitting that he drank heavily after taking antidepressants.
"Celia was a handsome person who was loved by all her teammates and friends", said Christie Martens, Iowa State head women's golf coach.
Employees of Sparky's One Stop saw him try to steal two energy drinks and confronted him.
Richards will next appear in court for a preliminary hearing on September 28.
The harassment case stems from an incident in January 2015 where he threatened to shoot up a gas station in Guthrie County after clerks there claim they caught him trying to steal energy drinks.