The New City teen missing since Friday was found dead in Congers yesterday afternoon. Clarkstown Police says 18 year-old Peter Ereifej was found at Hook Mountain State Park. Police say he was reported missing by his mother, who had indicated Peter previously had an issue with depression. More than 100 volunteers from Active International in Pearl River, where Peter’s mother works, assisted in the search for him at Rockland Lake State Park yesterday. The cause of death is under investigation and is being handled by State Park Police.