A 20-year old Lower Township man has been charged with a sex crime against a six year old girl. Lower Township Police today announced the arrest of Josue Montalvo who lives in the Villas. Township Police have charged Montalvo with aggravated sexual assault and with endangering the welfare of a child. The Cape May County Prosecutor’s Office also participated in the investigation. Montalvo was taken to the Cape May County Jail on $100,000 cash bail.