Sao Paulo, Brazil ? A wealthy young woman, her lover and his brother were convicted Saturday in the deaths of her parents, a crime that riveted Brazil with a tale of love across rigid class lines. Each was sentenced to about 40 years in prison.

Manfred and Marisa von Richtofen were beaten to death at their home in a wealthy district of Sao Paulo on Oct. 30, 2002.

Manfred von Richtofen, the great nephew of the World War I German ace known as the Red Baron, and his wife disapproved of their daughter’s relationship with Daniel Cravinhos, who is from a lower-middle-class family.

Prosecutors said Suzanne von Richtofen, Cravinhos, and his brother Christian plotted the murder because they wanted the couple’s estate, valued at $920,000.

Prosecutors said Richtofen, 22, let the brothers into the house late at night and checked to make sure her parents were sleeping. Then the brothers sneaked into the bedroom and bludgeoned them to death with iron bars.