Sean Kingston’s mansion in Florida was raided by cops on Thursday, RadarOnline.com has learned. Law enforcement sources said the performer is a “target” in an ongoing criminal investigation while revealing that his mother, Janice Turner, was arrested and is now facing fraud and theft charges. The Beautiful Girls singer was not home when a slew of officers showed up in multiple vehicles. More than 10 cops were seen in aerial images of his sprawling residence. It’s unclear what led up to the raid but TMZ, which first reported the news, noted that he was sued back in February for allegedly not pa…