Criminal law and procedure : cross-appeal by the State : prescribed minimum sentence for robbery involving the taking of a motor vehicle not considered by the trial court or this court in the hearing of the convicted person’s appeal : s 51 (2) of the Criminal Law Amendment act 105 of 1997 : cross-appeal succeeds : prescribed minimum sentence of 15 years’ imprisonment imposed, 10 of which ordered to run concurrently with the 18 years imposed on the count of murder : effective sentence 23 years’ imprisonment