A life insurance company that claims its $26 million investment vanished when a Center City law firm helped a businessman loot the assets of a suburban Philadelphia company he controlled has filed a legal malpractice lawsuit that seeks $61 million in damages.

Duane Morris & Heckscher and one its attorneys, Vincent F. Garrity Jr., are named as defendants in a conflict-of-interest lawsuit filed by Benchmark Holdings Inc., of Wayne, and Jackson National Life Insurance Co., of East Lansing, Mich.