LINCOLN, Neb. (AP) — The Nebraska Supreme Court has affirmed the conviction and lengthy sentence of an Omaha woman for the 2013 killing a 4-month-old baby in her care.

Sarah Cullen was convicted last year of intentional child abuse resulting in the death of Cash Bell and was sentenced to 70 years to life in prison. Doctors said the baby had been violently shaken.

In her appeal, Cullen primarily argued that evidence of the baby’s prior injuries while in her care should have been excluded from her trial. She also argued that her sentence was excessive.

On Friday, the high court rejected all of her arguments, saying her sentence was within the range allowed by law and that evidence of the baby’s prior injuries helped prove Cullen’s actions were intentional, rather than simply negligent.