The son of one of the victims of the Gilgo Beach killings filed a wrongful death lawsuit against alleged killer Rex Heuermann and his family.

Court documents obtained by News 12 show that Benjamin Torres, son of victim Valerie Mack, filed the lawsuit.

Mack is one of seven women investigators say was killed by Heuermann.

As News 12 has reported, sources say Heuermann is expected to plead guilty in the case as early as Wednesday.

News 12 has reached out to attorneys for Heuermann and his ex-wife about the lawsuit and is waiting to hear back.