Prosecutors seeking murder charges over Freddie Gray’s death rested their case against Caesar Goodson on Wednesday with an expert witness who crumbled under cross-examination. His testimony was the latest of several blows in the trial that experts say is prosecutors’ best shot at getting a conviction for Gray’s death. After failing to win in the first two trials, the case against Caesar Goodson is especially important for Marilyn Mosby, the embattled state’s attorney. Goodson was the driver of the van in which Gray was transported, and faces the most serious charge of second-degree depraved heart murder. Gray died of a...