Police say boy 's body was found 11 months after he was reported missing in 1991 . A new investigation was launched after a routine cold - case trial . Boy 's mother , Michelle Lodzinski , was arrested 23 months after reporting her son missing .
Prosecutors say boy 's body was found 11 months after he was reported missing in 1991 . A new investigation was launched after a routine cold-case review . Boy 's mother , Michelle Lodzinski , was arrested 23 years after reporting her son missing .