Yesterday, ex-LA Police Department Captain Greg Meyer testified at the murder trial of BART Security Officer Johannes Mehserle, accused of shooting Oscar Grant. mercurynews.com reports that “Meyer, who now works as a police tactics consultant, said Bay Area Rapid Transit had ‘some deficiencies’ in their stun gun training, including not putting officers in scenarios that would increase their stress. ‘Was the training provided to Mr. Mehserle adequate to prevent weapon confusion'” defense attorney Michael Rains asked. ‘No,’ Meyer said.” Clearly. Meyer also revealed that this “confusion” has been an issue for other officers before. Six times, in fact . . .