An Uber driver who is accused of raping four women in San Luis Obispo is an illegal immigrant who was previously deported back to Mexico, according to the San Luis Obispo County District Attorney’s Office.

Alfonso Alarcon-Nunez, 39, allegedly lured intoxicated women into his vehicle, followed them into their homes, raped them and stole valuables from them. At the time of his arrest last week, Alarcon-Nunez was living in Santa Maria and working as an Uber driver.

In 2005, Alarcon-Nunez was deported to Mexico from New Mexico, District Attorney Dan Dow said at a press conference on Monday. Dow declined to disclose if Alarcon-Nunez has a prior criminal record.

After his deportation, Alarcon-Nunez returned to the United States, procured a drivers license and starting driving for Uber.

Alarcon-Nunez would solicit passengers outside parties in SLO that had requested an Uber driver, police said. He would then collect payments through a Vemmo pay service to disguise his identity.

On Dec. 18, Alarcon-Nunez is accused of picking up another Uber driver’s passengers, driving two roommates to their home and then raping and robbing both roommates.

On Jan. 5, Alarcon-Nunez is accused off assaulting a woman with the intent to commit rape while in the process of a robbery.

On Jan. 14, Alarcon-Nunez is accused of picking up another Uber driver’s passenger, raping the women in her home and the robbing the victim.

Prosecutors have charged Alarcon-Nunez with 10 felonies including rape of an intoxicated victim, assault, burglary and grand theft. He remains in jail with his bail set at $300,000.

Prosecutors believe there are more victims and are currently investigating several other incidents, Dow said.