Kansas City ? A 55-year-old convicted sex offender has been charged with raping a woman and impersonating a police officer near the Village West area of Kansas City, Kan.

Prosecutors said the man approached a woman in a Walmart parking lot around 1:30 p.m. Monday, identified himself as a police officer and said he was arresting her for shoplifting.

The woman, who is in her 20s, told investigators that she got into his car and that he drove her to a nearby Best Buy parking lot, where he raped her then let her go, police said.

Police and Kansas parole officers tracked the man to a home in Kansas City, Kan., through a GPS device he wore and arrested him Tuesday.

The Wyandotte County District Attorney’s office did not know if he had hired an attorney and declined to comment on the case Thursday. The man was in custody in lieu of $250,000 bond.

The Kansas Parole Board granted the man parole in January 2009 after he served prison time for attempted rape in a 1977 case and rape and aggravated sodomy in 1980 in Sedgwick County.

Upon being notified of the man’s status, Sedgwick County attempted to have him declared a sexually violent predator. Such a declaration would have remanded him indefinitely to Larned State Mental Hospital under the state’s civil commitment program. But a Wichita jury deadlocked in January on whether he was a predator, and he was released on parole.

“Learning this new information is extremely frustrating for our office because we do not take lightly filing the petition to have someone declared a sexually violent predator,” Sedgwick County district attorney’s spokeswoman Georgia Cole told The Associated Press. “It is only when we have extreme concern for the safety of the community that we would take such action. Unfortunately, [he] has now victimized someone new, allegedly.”

The man was living in Kansas City, Kan., under the supervision of the state’s Sex Offender GPS Unit, and forced to wear a tracking device.

In addition to the impersonation and rape charges, he also is charged with aggravated kidnapping, aggravated intimidation of a victim and aggravated sexual battery.

Video surveillance cameras at the Best Buy and Walmart parking lots contributed to the investigation, prosecutors said.