(January 6, 2016, 11:49 AM EST) -- PHILADELPHIA — A Pennsylvania federal judge ruled Jan. 4 that a psychiatrist but not a forensic pathologist may testify in a personal injury lawsuit regarding a driver’s drug addiction at the time of a motor vehicle accident (Kathy Leister, et al. v. Jewell Transport, Inc., et al., No. 14-1411, E.D. Pa.; 2015 U.S. Dist. LEXIS 173624)....