Cook County prosecutors have declined to charge Starlin Castro over accusations by a woman that the Cubs shortstop sexually assaulted her at his Chicago home last fall.

Sally Daly, a spokeswoman with the state's attorney's office, said Friday there was insufficient evidence to charge Castro with wrongdoing following a "comprehensive review" of the allegations by Chicago police and prosecutors.

Police interviewed the alleged victim as well as other witnesses but did not take the matter to a grand jury because of the lack of evidence, according to Daly.

"All of the facts of the case were examined very closely," she said. "The review of the case was exhaustive."

If new information becomes available or new witnesses come forward, officials could re-open the investigation, Daly said.

The woman accused Castro of sexually assaulting her at his Near North apartment in September, according to a police report provided to the Tribune. The alleged victim was then 22, a source said at the time.

Castro had left for his home in his native Dominican Republic by the time the police learned of the allegation. When he returned in January as the main attraction for the Cubs annual fan fest, he was interviewed by authorities at Area 3 police headquarters.

In a telephone interview Friday, Paul Kinzer, Castro's agent, said Castro was "very happy" to learn that prosecutors had decided against charges.