INVESTOR ALERT: Fields Kupka & Shukurov LLP Is Investigating PACCAR Inc for Potential Breach of Fiduciary Duty Claims NEW YORK, March 16, 2020 (GLOBE NEWSWIRE) -- Fields Kupka & Shukurov LLP is investigating potential breach of fiduciary duty claims involving the board of directors of PACCAR Inc (NASDAQ: PCAR)....