Movie about blood hunting monster building a demon with the blood, egyptian scarab ring?

What is that 1980's or 1990's movie about a blood-collecting monstrous dead man who is using the blood to build a demon because of a scarab ring that gives resurrection? A detective aids a woman find out about her dead husband's obsession with an ancient egyptian scarab ring that summons the demon's power rising the dead person from the tomb to collect blood from victims and bring the demon back to life.