OXNARD, Calif. - The Broward County (Fla.) State Attorney's Office has officially closed its sexual assault investigation into former Cowboys receiver Michael Irvin and isn't pursuing charges in the case, a spokesman said Monday.

On May 31, the Fort Lauderdale (Fla.) Police Department closed its investigation into Irvin and turned over its findings to the state attorney's office. Broward County (Fla.) State Attorney Michael J. Satz and his investigators have been reviewing the case since late May and declined to pursue charges against the Hall of Famer because of inconsistent statements by the alleged victim and a lack of evidence.

Irvin, 51, was investigated on allegations of drugging and raping a 27-year-old woman, whom he had considered a longtime friend, at a Florida hotel in late March. He was never arrested and had adamantly denied wrongdoing throughout the past four months.

According to the Broward County investigation, the alleged victim's rape kit test that was taken at the hospital came back negative. Also, the toxicology report showed the female had drugs and alcohol in her system. According to the state attorney's investigation, the toxicology report showed the woman tested positive for amphetamines and cocaine, among other drugs. The woman told police that she had taken "a small amount" of Xanax and Ecstasy and also cocaine on the weekend before she met up with Irvin.

"She insists that she did not take any drugs other than her Adderall on the day she went out with the defendant," according to the Broward County investigation.

Broward County officials say they reviewed police reports, video surveillance evidence, controlled phone calls, sworn statements, a toxicology report and a crime lab analysis report during their investigation and determined "it is clear there is not enough evidence to establish that a crime was committed.

"The victim's inability to recall details, the inconsistent statements, her alcohol and drug use, coupled with the video evidence showing her voluntarily entering the hotel with the defendant and two and a half hours later exiting the hotel elevator with the defendant while not appearing upset, make this a case where there is not a reasonable likelihood of conviction."

This isn't the first time Broward County has elected not to pursue sexual assault charges against Irvin.

On July 4, 2007, Irvin was accused of sexual assault while he was at the Seminole Hard Rock Casino in Hollywood, Fla. That case was also investigated by the Broward County State Attorney's Office, but charges were never filed. A civil suit was filed against Irvin in 2010, but that case was eventually settled out of court in January 2011.