Steve C. Wilson
Greg Winslow

PHOENIX — Former University of Utah swim coach Greg Winslow, accused of sexually abusing a teenage girl he coached in Arizona six years ago, won't face charges in the case, prosecutors announced Wednesday.

Winslow, 38, was suspended from his coaching duties at the U. after school officials learned of the allegations in February. Utah athletics director Chris Hill decided not to renew his contract and hired Joe Dykstra to replace him.

The university also launched an investigation, which is ongoing, regarding allegations of physical and emotional abuse and inappropriate behavior during Winslow's six years in Utah.

Arizona authorities said they found sufficient cause for an indictment in the sexual abuse case but lacked proof to seek charges.

"We were unable to meet the necessary burden of proof required to move forward with formal charges," Maricopa County attorney Bill Montgomery said in a statement Wednesday.

Montgomery said his office would not pursue the matter further without additional information to support the allegations.

A report released by Arizona State University police, where Winslow was a popular swim coach from 2003 to 2007, said Winslow was 32 when he took a special interest in a 15-year-old swimmer on the Sun Devils Aquatics club in Tempe.

Authorities said the incident occurred with a woman who not a student, and the club was not affiliated with the school.

Winslow has denied the allegations, and couldn't be reached for comment Wednesday. His phone number was disconnected.

ASU police said there were no witnesses or other victims on the swim club to corroborate the Arizona woman's allegations. They recommended criminal charges based on a secret recording they arranged between the woman and Winslow in November.

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The University of Utah review is based on accusations from several parents of Winslow's swimmers. Hill, who set up the outside investigation, said he's not aware of any sexual abuse allegations against Winslow in Utah.

Matt Fiascone, a parent of one of Winslow's swimmers in Utah, said Winslow commonly came to practice drunk; had outbursts of anger, including once punching an assistant coach; used racial slurs; and once forced a team member to swim underwater with his hands tied to a PVC pipe that was strapped to his back until he blacked out.

Associated Press writer Brady McCombs contributed to this report from Salt Lake City.