Updated

A Baltimore judge will hear motions Wednesday from prosecutors who want to force an officer whose trial ended in mistrial late last year to testify against four other officers charged in the death of Freddie Gray.

Prosecutors are asking Baltimore Circuit Judge Barry Williams to force William Porter to testify against four officers even though Porter's charges are still pending after his own trial ended in December in a hung jury.

Williams ruled in late December that Porter must testify against van driver Caesar Goodson, whose trial was slated to begin last week. But Goodson's trial has been postponed indefinitely while an appeals court decides whether to uphold or overturn Williams' ruling.