Prudential Insurance Company of America and Akin Gump LLP are facing a federal lawsuit seeking the proceeds of a life insurance policy that was filed Tuesday by the siblings of an associate at the law firm who died after an illicit drug overdose.

Julia Ghahramani’s younger sister and brother say that her death was an accident “caused solely by the involuntary exposure to a fatal amount of fentanyl.” Prudential denied their claim on the life insurance policy because she voluntarily took cocaine that had been laced with fentanyl and, thus, her death is subject to an exclusion in the law …