Three South Jersey men have been charged with sexual assault and morals counts after being accused of having sex with a 15-year-old Mount Laurel girl, authorities said Monday.

The men allegedly met the girl after chatting with her on social networking sites. The girl then arranged to meet with each of them on various dates between February and April for sex in their cars, said a spokesman for Burlington County Prosecutor Robert D. Bernardi.

One of the girl's parents called police after discovering her activities and gave investigators the girl's cellphone and iPod Touch.

A detective from the prosecutor's office pretended to be the girl and, via text messages, arranged to meet each of the men on separate dates.

Expecting another sexual encounter with the girl, the men were arrested when they arrived at the arranged meeting spot, the spokesman said.

Charged were John O. Goins III, 28, of Willingboro; Dorence Y. Caulker, 33, of Lumberton; and Matthew M. Sadowski, 26, of Mount Laurel.

Goins, arrested April 28, was charged with sexual assault, attempted sexual assault, criminal sexual contact, debauching the morals of a minor and obstructing justice. He was released after posting $125,000 bail.

Caulker, arrested May 5, was charged with two counts of sexual assault, three counts of debauching the morals of a minor, and criminal sexual contact. He is being held at the Burlington County Jail on $300,000 bail.

Sadowski, arrested May 17, was charged with two counts of sexual assault, attempted sexual assault and three counts of debauching the morals of a minor. He was released after posting $100,000 bail.

Contact staff writer Sam Wood at 215-854-2796 or samwood@phillynews.com.