When they died , Mithridates VI gave his mother and brother a royal funeral .
It is unclear whether Chrestus also died in prison from natural causes or was later tried for treason and then executed on the orders of Mithridates VI .
When they died , Mithridates VI gave Chrestus ' mother and brother a royal funeral .
It is unclear whether Chrestus also died in prison from natural causes or was later tried for treason and then executed on the orders of Mithridates VI .