An appeal from a convicted killer in the 1990 murders of a Cape Coral girl and her babysitter is heading to the Florida Supreme Court.Joseph Zieler was sentenced to death for the murders of 11-year-old Robin Cornell and 32-year-old Lisa Story.He was sentenced following the 33-year-long cold case investigation.The Florida Supreme Court will hear oral arguments in February for Zieler's appeal of his death penalty sentence. It is scheduled for Wednesday, Feb. 5, at 9 a.m.Zieler was arrested in 2016 and later convicted for Robin Cornell and Lisa Story's deaths in May 2023.The jury recommended the death penalty in a 10-2 vote before the judge sentenced him to death.Zieler filed an appeal in July 2023. All death penalty cases in Florida are automatically granted an appeal.Get More from the free ABC7 News app for the latest news and weather alerts.