(07-08) 14:59 PDT LOS ANGELES -- Jurors have reached a verdict in the murder trial of former BART police Officer Johannes Mehserle, who shot and killed unarmed train passenger Oscar Grant on Jan. 1, 2009. The verdict is scheduled to be read in Judge Robert Perry's downtown Los Angeles courtroom at about 4 p.m. today, said a source with knowledge of the matter. Jurors were given four options during deliberations. They could convict Mehserle, 28, of second-degree murder, voluntary manslaughter or involuntary manslaughter, or they could acquit him. The panel began deliberations Friday, but had to start from scratch Wednesday...