Her co-accused, her business associate Vela Mabena, is charged with murder.
Judge John Murphy told the court on Monday that Maqubela lied about details of her husband’s death and this affected her credibility.
He found that she was in possession of the acting judge’s cellphone from the Friday in 2009 when he was believed to have died, until the following Monday.
Murphy said she had led the court to believe that a policeman who wanted to blackmail her husband took his phone and placed it in a jacket pocket in his apartment to be discovered by police that Monday.
He said her testimony was contradicted by cellphone records, which showed that three of her cellphones activated the same base stations or those near her husband’s phone in Cape Town, Johannesburg, and the Eastern Cape in that period.