Heartbreaking victim impact statements have been heard in court at a teenager's sentencing over a grandmother's fatal ...

A teenager who stabbed a 70-year-old Queensland grandmother to death at a shopping centre will be sentenced in court, 21 months on from the tragedy.

Vyleen White, 70, died after she was stabbed in the car park of a Redbank Plains shopping centre in February last year.

The teenager who stabbed a beloved 70-year-old grandmother to death at an Ipswich shopping centre is expected to face sentence for her murder today.