The seven-day excavation of an East Vancouver basement has turned up no remains of a woman allegedly killed there more than 30 years ago.

Investigators and archaeologists excavated the home on Rupert Street in connection to the 1977 disappearance of Katherine Mary Brown.

The probe began after her son Robert Sturcz told a veteran VPD officer that he witnessed his father kill his mother in their family home in 1977.

The Maple Ridge resident told CTV News that he was just a little boy when his father dug a hole in the ground for his mother's makeshift grave.

Sturcz, who has struggled with drug addiction and has spent time in prison, said no one believed his story until he told former Vancouver police officer Dave Dickson in September.

Dickson said he believed the man's story was credible.

Const. Jana McGuinness said Tuesday that teams wrapped up the dig yesterday and found no evidence of murder at the home.

"Regrettably, we are no closer to finding out what happened to Catherine Mary Brown," she said.

"We will continue to investigate this as a missing person's case and also seek to gain a clearer understanding of why Robert Sturcz believes that he witnessed the murder of his mother in their family home so many years ago."

Catherine Mary Brown would now be 76-years-old.