A Pennsylvania appeals court has rejected efforts to reinstate a legal malpractice lawsuit against a Philadelphia personal injury firm that allegedly failed to sue all possible parties following an auto accident.

A unanimous three-judge Superior Court panel on Thursday determined that Jibreel Townsend failed to bring a case against Spear Greenfield and Richman over allegations that the firm, which helped him secure a $702,800 settlement, mishandled the case. The decision upheld a ruling by a Philadelphia Court of Common Pleas judge, who dismissed the case, captioned Townsend v. Spear, Greenfield and Richman, on summary judgment.