Freddie Gray case: Judge orders William Porter to testify in other trials

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Judge orders William Porter to testify in the trials of Caesar Goodson Jr. and Alicia White

Porter's legal team says they'll appeal, arguing that forcing him to testify violates his rights

Baltimore CNN  — 

Baltimore police Officer William Porter will have to testify in the cases of two other officers facing charges in the death of Freddie Gray, a judge ruled Wednesday.

Judge Barry Williams ordered Porter to testify in the trials of Officer Caesar Goodson Jr. and Sgt. Alicia White, under limited immunity granted by prosecutors.

Porter’s attorneys, who argue that forcing him to testify in the other cases would violate his rights, said they will file an appeal.

Porter was the first of six officers to go on trial in the closely watched case involving Gray, a 25-year-old detainee who suffered a fatal neck injury in April after being shackled and placed without a seat belt in a police van. Gray’s death set off citywide demonstrations and calls for justice.

After jurors deadlocked, a mistrial was declared in Porter’s trial last month. Porter is scheduled to face a retrial in June.

In compelling Porter to testify under this limited immunity, prosecutors can’t use the officer’s testimony in the Goodson and White cases, or anything learned from that testimony, against Porter when his own case is retried.

Porter’s legal team argued there was no way the state could guarantee that information from Porter’s testimony in other cases wouldn’t be used against him later.

Jury selection in the trial of Goodson, who drove the transport van carrying Gray, is set to start on Monday.

CNN’s Catherine E. Shoichet and Eliott C. McLaughlin contributed to this report.