A wicked Missouri mother neglected her son so badly that his legs rotted off and had to be amputated, according to police.

Catiga Wren Arnett, 54, was arrested on July 16 for the abuse of an elderly, disabled or vulnerable person after police found her adopted son, who has Spina bifida, allegedly enduring heinous conditions, according to court documents reviewed by Daily Mail.

Her son, who has the mental capacity of a 10-year-old, lived with Arnett in Noel - about five hours from Kansas City - where the reported neglect occurred between January 1 and March 7, records revealed.

Her child's age was not mentioned in the legal filing, but his condition - a birth defect that causes the spinal cord not to close completely during pregnancy - has 'rendered him a paraplegic,' court documents said.

Paramedics were called to Arnett's home on March 7 where they found her son on his bedroom floor wearing only an adult diaper, per the report.