Son of the Demented Doctor: The Mad Mortician

From the Bizarre Cases of Dr. Lawrence - It turns out that Dr. Struckhoff aka "The Demented Doctor" has a son! - perhaps more evil and perverted than his father,  who operates the family funeral home and morgue, for the purpose of disposing of his father's patients who have "accidentally" passed away under his care. Meanwhile, two local teens break into the morgue, but are soon captured and injected with a mind controlling drug. They are made to fight to the death, but old Dr. Struckhoff soon intervenes, chloroforms them and brings them to the morgue where they're stripped and prepared for embalming. Soon they wake up. One is then strangled to death and the other's neck is broken. Ultimately both boys end up being the next "customers" of The Struckhoff Mortuary.