Prosecutors in Baltimore are asking an appeals court to compel a police officer to testify against three fellow officers in the Freddie Gray case.
In filings made public Friday, the Baltimore State's Attorney's Office says it's appealing Circuit Judge Barry Williams' Jan. 20 decision blocking prosecutors from calling William Porter as a witness against officers Edward Nero and Garrett Miller, and Lt. Brian Rice.
The dispute could delay their trials, starting with Nero's Feb. 22 on assault, misconduct and reckless-endangerment charges.
Porter's manslaughter trial ended in a hung jury in December.
Maryland Judiciary spokeswoman Angelita Williams said in email that no appeal documents have been filed.
Gray was a 25-year-old black man who was fatally injured in police custody. Six officers were charged in his arrest and death.