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Tyson says he is innocent of the allegation.

SAN BERNARDINO, California (CNN) -- The district attorney's office said Monday it is reviewing a sheriff department's investigative report on the rape allegation against heavyweight boxer Mike Tyson.

"I will be reviewing the information submitted by the sheriff's department," said Deputy District Attorney Michael Ramos of the major crimes unit for the San Bernardino County District Attorney's Office, "and we will make a decision about whether a criminal offense was or was not committed by Mike Tyson. And we will not be making that decision until at least the end of this week."

The alleged incident took place July 16, said Mike Folette, a detective with San Bernardino County Sheriff's Department.

Folette said a 50-year-old acquaintance of Tyson's reported she was raped by the boxer at his rental home in Big Bear City, California, the mountain resort town where Tyson had been in training for his upcoming match in Denmark.

Tyson faces unranked Danish heavyweight, Brian Nielsen in Copenhagen September 8. No world title is at stake in the fight.

Tyson, who served more than three years in prison in Indiana after being convicted of rape in 1992, has said that he will be proven innocent of the recent allegations.

"Everything in the long run will prove that I'm innocent, and I'm just looking forward to that, but I'm not sweating it at all," Tyson said in a brief interview last week with Phoenix television station KTVK.

Darrow Soll, Tyson's attorney, who is based in Phoenix, Arizona, met with the sheriff's department and the district attorney. Sgt. Frank Gonzales of the sheriff's department said the meeting was positive.

"We are aware of the allegation against Mr. Tyson," Soll said in statement. "We feel that the allegation is without merit. We are hopeful that authorities will conduct a thorough and complete investigation, which we expect will clear Mr. Tyson of any wrongdoing. Mr. Tyson will continue to train as scheduled and looks forward to competing in September."

Gloria Allred, a well-known attorney in Los Angeles, California, said Monday she is representing the alleged rape victim and that her client takes issue with the fact Tyson was not interviewed directly by investigators.

"While Tyson declares his innocence on television, my client has cooperated with law enforcement and has been interviewed by them," Allred said in a written statement. "I call on Mr. Tyson to do the same. Apparently he chose to send his attorneys to talk to investigators rather than appearing himself .... Does this convicted rapist have something to hide?"

Tyson was not arrested and no warrant for his arrest was issued, officials said.

"In a case like this you depend on your victim, physical evidence and witness statements -- but this case lacked enough probable cause to arrest him initially based on the allegations alone," Gonzales said. "Investigators are working to search out the facts of the possible victim's allegations."

The alleged victim sought medical attention at the Bear Valley Community Hospital July 17. The hospital notified the sheriff's department it had treated an assault victim. Folette then made contact with the alleged victim, who at first did not want to pursue the matter.

The alleged victim changed her mind on July 24 and contacted him to file a report identifying Tyson as the suspect, Folette said.