The woman accused of being the evil ringleader who allegedly chained four mentally challenged adults locked in a Philadelphia dungeon will undergo a mental evaluation to decide whether she is competent to stand trial, RadarOnline.com has learned.

As RadarOnline.com previously reported, Linda Ann Weston was arrested last month and now faces a string of charges including criminal conspiracy, aggravated assault, kidnapping, criminal trespass, unlawful restraint and false imprisonment after three men and a woman were found chained in a Tacony, Pennsylvania house.

Municipal Judge Martha Neifeld agreed on Wednesday for a psychiatric assessment to be carried out in response to a request from the 51-year-old's attorney, George Yacoubian, based on the issues of mental retardation and low IQ, reported NBCPhiladelphia.com.

New details on what could be the youngest victim of the Philadelphia dungeon mastermind emerged on Monday, but investigators still don't know where the toddler, known as Little L, is, RadarOnline.com has learned.

Linda Ann Weston, the ringleader of the evil gang who kept four mentally challenged adults chained in a basement, claimed to be the mother of the little girl, and told a neighbor, Chevelle McGill that she could adopt her.

Little L lived for a few months with McGill in the Kensington area of the city, while she waited for Weston, 51, to complete adoption papers, reported the Philadelphia Daily News.

The ringleader responsible for chaining four mentally-challenged adults in a Philadelphia basement had previously had her children returned to her by social services despite a history of abuse and a horrific murder conviction, RadarOnline.com has learned.

Linda Ann Weston was paroled from prison after serving four years for the 1981 killing of a 25-year-old man who she hit with a hammer, locked in a closet and then starved to death -- she then walked into family court and demanded they give her children back, and the request was unbelievably granted.

As RadarOnline.com previously reported, Weston, 51, Eddie Wright, 49, and Thomas Gregory, 47, were arrested on Saturday and are facing a string of charges including criminal conspiracy, aggravated assault, kidnapping, criminal trespass, unlawful restraint and false imprisonment after three men and a woman were found chained in a Tacony, Pennsylvania house.

More horrors have emerged from the depths of the Philadelphia dungeon where four mentally-challenged adults were chained up -- as details of incest, prostitution and drug abuse surface, RadarOnline.com has learned.

The brothers and sisters of the alleged ringleader, Linda Ann Weston, revealed the torment that they endured at the hands of their sadistic older sibling on Thursday, ABCNews.com reported.

"She would force my younger brothers and sisters to have sex. She would have sex with my other brothers and sisters," one brother, who was too terrified of 51-year-old Weston to be named, told WPVI-TV.

The ramshackle cellar looks like it's been decorated for Halloween but the grimy room is actually a real life house of horrors where four mentally challenged people were chained-up and starved, and RadarOnline.com has the grisly photos.

Phildelphia police searched the converted movie house in the Tacony neighborhood of the city on Saturday and discovered the captives chained up and lying in their own filth in a 10-by-15-foot boiler room, which contained bathroom buckets but no food and didn't have ventilation or sunlight.

PHOTOS: Inside The Philadelphia Dungeon Of Horrors

As RadarOnline.com previously reported, suspects Linda Ann Weston, 51, Eddie Wright, 49, and Thomas Gregory, 47, are now facing a string of charges including criminal conspiracy, aggravated assault, kidnapping, criminal trespass, unlawful restraint and false imprisonment after three men and a woman were found chained in a Tacony, Pennsylvania house.

A Philadelphia woman accused of locking four mentally challenged adults in her basement so she could steal their social security checks may have committed similar heinous crimes before, RadarOnline.com has learned.

Linda Ann Weston was arrested along with two accomplices on Saturday night and now police have discovered documents belonging to up to 50 other potential victims in Florida, Virginia and Texas, ABCNews.com reported.

The 51-year-old and her alleged co-conspirators, Eddie Wright, 49, and Thomas Gregory, 47, are facing a string of charges including criminal conspiracy, aggravated assault, kidnapping, criminal trespass, unlawful restraint and false imprisonment after three men and a woman were found chained in a Tacony, Pennsylvania house.