22-year-old inmate dies in Lincoln

LINCOLN, Neb. -- An inmate in the Nebraska prison system has died.

22-year-old Xavier Valentine passed away on Wednesday in a hospital in Lincoln. He was incarcerated at the Nebraska State Penitentiary.

Valentine's sentence started June 5, 2018. He was serving a sentence of 10-30 for charges out of Douglas County that included second-degree assault and use of a deadly weapon to commit a felony.

While the cause of death has yet to be determined, Valentine had been undergoing treatment for a long-term medical condition.

A grand jury will conduct an investigation.