Three persons, including the mother of the siblings who were murdered, testified before the First Additional District Judge on Monday.

Mother Sangeetha, aunt Kamalabai, and call taxi owner Anbu alias Gandhiraj testified before Judge N. Seshasayee. The case relates to the abduction, rape and murder of a 10-year-old girl and the abduction and murder of her seven-year-old brother on October 29, 2010.

The city police arrested Mohanraj and Manoharan. Mohanraj was shot dead on November 9, 2010 when he tried to escape.

The prosecution case is that former school van driver Mohanraj kidnapped the girl and the boy. He along with his friend Manoharan took the children near the PAP canal. Both allegedly sexually assaulted the girl, and tortured the boy before drowning them in the canal.