ANNA, Texas (CBSDFW.COM) – Anna Police have arrested a man they said committed sex acts on a 3-year-old girl he was babysitting.

The suspect is James Delavega of Plano.

He’s being charged with Aggravated Sexual Assault of a Child.

Anna Police tweeted Wednesday, “While you were sleeping… James Delavega, a 40-year-old resident of Plano, was arrested for committing sexual acts on a three-year-old child he was babysitting in Anna. Another child sexual predator taken off our streets by the efforts of your @AnnaTXpolice department.”

The Anna Police Department later said Delavega is 50 years old.

Anna Police said the victim’s mother and her friend went out Tuesday night. 

They asked the friend’s dad, Delavega, to babysit their children.  There were three kids total.  The babysitting took place at the friend’s home in Anna.

The women returned to the house, where they told police they caught the suspect in the act of sexually assaulting the girl.

Officers were dispatched to the scene.  Once there, officers contacted investigators who determined there was “enough probable cause to believe he committed the act we were being told about.”.

Police Chief Jeff Caponera declined to go into any detail on what the specific sex act was, but called it, “quite honestly, disgusting.”

Asked if there was physical evidence to support the accusation, the chief said police have not received the results from SANE (Sexual Assault Nurse Examiner)  but “do believe there will be substantial evidence to confirm our suspicion.”

Police are working with the Collin County Children’s Advocacy Center and the Plano Police Department since Delavega lives in Plano.

CBS11 spoke Delavega’s son who said he was just learning of his father’s arrest but family members are surprised and shaken by the news.

If convicted, De La Vega faces at least 25 years in prison.

He’s currently being held in jail without bond.