A toddler whose remains were found inside a suitcase in Philadelphia this spring was starved to death by members of a religious cult, including his mother, in part because he refused to say "amen" after meals, police said.

Ria Ramkissoon, the mother of Javon Thompson, was charged Sunday with first-degree murder in the boy's death, and Baltimore police said Monday that three other members of a group called 1 Mind Ministries have also been charged with first-degree murder. Police and Ramkissoon's family say the group is a cult.

Members did not seek medical care for Javon when he stopped breathing, and the boy died in his mother's arms, according to court documents that described police interviews with a confidential informant and two children. He would have been about 15 months old when police say adults stopped feeding him in December 2006.

Ramkissoon, 21, was being held Monday in the psychiatric ward of Baltimore's Central Booking and Intake Center, and a bail review was postponed until Tuesday. Her public defender declined comment.

The three other people charged in Javon's death - Queen Antoinette, 40, also known as Toni Ellsberry or Toni Sloan; Marcus Cobbs, 21; and Trevia Williams, who turns 21 on Tuesday - were already in custody. They were arrested in May in New York City on warrants charging them with failure to appear in court in Baltimore. Those charges stemmed from a scuffle with police in a child custody dispute.