LAWRENCE — City police officer Carlos Vieira was arrested Monday, accused of raping a 13-year-old boy he met last summer, authorities said.
Vieira, 49, is charged with two counts of aggravated rape of a child and two counts of assault and battery on a child under under age 14, according to a statement released by District Attorney Jonathan Blodgett Monday evening.
The investigation was launched in January when the alleged victim's mother contacted Blodgett's office saying her son, age 13, met Vieira using a social media app and engaged in sexual activity with him last summer, according to the statement.
The case was investigated by state troopers assigned to Blodgett's office. Lawrence police were not involved.
Vieira, 49, is expected to be arraigned on the charges on Tuesday in Lawrence District Court.
A former detective, Vieira most recently worked the midnight shift.
He was immediately placed on paid administrative leave, said Police Chief Roy Vasque.
Vieira's pay will be halted if he is indicted on the rape charges by the Essex County grand jury, Vasque said.
"Obviously, I am very disappointed," said Vasque, who learned for Vieira's arrest around 3 p.m. Monday.
"The allegations against Officer Vieira are extremely troubling but we take them very seriously," Vasque continued.
Mayor Daniel Rivera said if the charges against Vieira are "found to be true we will move swiftly to remove the officer involved."
"I am angered, sickened, dismayed and saddened by the allegations and charges. We have worked very hard to improve and uplift the professionalism of the Lawrence Police Department," Rivera added.
"We have fired and forced out many officers who did not meet and could not stand up to the code of conduct of high professionalism that my office, the chief of police and the men and women and leadership of the police unions have worked to established. This is a travesty," Rivera concluded.
Vieira was held at the state police barracks in Newbury following his arrest. Firearms belonging to him were seized from his Lawrence home, police said.
Follow staff reporter Jill Harmacinski on Twitter @EagleTribJill.