Lisa Lau Tu, also known as Chuan-Yu Lau, was 41 when she was last seen at her Potomac, Maryland home on July 14, 1988. Her common-law husband, Gregory Mung-Sen Tu, told authorities he had taken her to the airport for a flight to San Francisco, but the seat purchased in her name was found empty and the friend she was said to be visiting had not been contacted and was not ill.

Investigators uncovered evidence pointing to violence at the Tu residence. Luminol revealed extensive blood in the basement near a loveseat Lisa often slept on, with a trail to the bathroom and upstairs; DNA testing linked the blood to Lisa. Items including a meat cleaver, twine and plastic wrap were found in Gregory Tu’s Lincoln Town Car, and a Browning .380 belonging to him went missing around the time of her disappearance. Two days after Lisa vanished, Gregory paid to have the loveseat removed from the house.

Gregory Tu was arrested in Las Vegas in September 1988, charged with first-degree murder, and after an overturned conviction was convicted at retrial in 1992 of second-degree murder and sentenced to 30 years. Lisa’s remains have never been located. Did anyone in the Potomac area have contact with Lisa in the weeks before July 14, 1988, or remember the loveseat being taken from the house?