Vampire at Midnight (1987)

A vampire serial-killer is puzzling the LAPD, leaving bodies drained of blood without a pattern to be followed. When the detective in charge of the investigation is murdered by the vampire, Detective Roger Sutter partially assumes also the case. He has crush on his neighbor, the pianist Jenny Carleton, and Officer Lucia Giannini from his precinct likes him. Jenny is invited to play piano in a party promoted by the hypnotizer Victor Radikoff that gives motivational speeches and he uses his power to convince her to practice with him. What Jeannie does not know is that Victor is the wanted vampire.