After nearly three days of deliberating, and almost two decades of investigation, a jury found Ulysses Roberson guilty of second-degree murder in the 1985 killing of his 4-year-old son, Alexander Olive.

Roberson was extradited six years ago from a Washington state prison on suspicion of murdering his 4-year-old son. Olive’s body has never been found.

The prosecution argued that Ulysses Roberson allegedly lured women into a life of subservience with offers of free astrological readings and a promise of a better life. He also violently disciplined his wives and children, prosecutors said. That violence included Roberson hanging Olive by his ankles for days and beating the 4-year-old as a punishment for wetting himself.

Roberson killed Olive, the prosecution said, after disciplining the small boy by making him stand naked in the garage of a Monterey Drive home in the middle of winter without food.

Roberson is scheduled to be sentenced on Jan. 6.