Terror at London Bridge

The name of this movie is Terror at London Bridge released in 1985-11-22 and it's main theme is London Bridge, London, England, 1888: Jack the Ripper dies in the Thames river. London Bridge, Lake Havasu, Arizona, 1985: the last original stone used to rebuild London Bridge is laid and all the city is happy...but then some strange murders start happening. Policeman Don Gregory has some suspects, but when he develops a theory that Jack the Ripper has been resurrected, no one believes him..