In Baltimore, the police officer who drove the van in which Freddie Gray is believed to have suffered fatal injuries that left his spine “80 percent severed at his neck” has had his trial postponed. Jury selection was due to begin Monday for Officer Caesar Goodson, the second of six officers to go on trial in the case and the one facing the most serious charges. But the case has been postponed amid a dispute over whether a key witness, Officer William Porter, will be forced to testify. Porter’s own trial for his role in Gray’s death ended in a mistrial last month, and he faces a retrial in June. At his own trial, Porter said he told Officer Goodson that Freddie Gray needed to go to the hospital.