SIMI VALLEY ( — An 18-year-old was in custody Tuesday after allegedly sexually assaulting three females between the ages of 13 and 41 years old.

Simi Valley police arrested Christopher Ng on Sunday. He’s scheduled to be arraigned Wednesday on felony charges of forcible lewd acts with a child.

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The investigation into Ng started last November when one of his alleged victims came forward. Since then, detectives identified two more victims. Police said two of the victims were acquaintances of the suspect.

Investigators say Ng used multiple social media accounts to lure and contact his victims. He also had an alias on Facebook: Chris Pastrana.

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“He will identify his victims either through social media. For example, Facebook, Twitter, Instagram,” police Cmdr. Stephanie Shannon said. “The age span is unique. And, again, just the way and methodology that Mr. Ng uses to identify and ultimately befriend his victims and then eventually sexually assault them.”

Police believe there may be other possible victims.

“Mr. Ng’s behavior is a concern to investigators at the police department and because of the nature and the way he identified his victims, there is a concern there may be other victims out there,” Shannon said.

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Anyone with information related to the suspect or unreported related crimes was asked to contact Det. Brian Young at (805) 583-6248.