years ago I watched an episode where a young mother and her baby went out to a outing the mother ends up murdered in the lake and there's no baby insight does anyone know if this case was resolved?

I think you're actually talking about the murder of Rachel Timmerman and her baby Shannon, who was never recovered. Her killer, Marvin Gabrion, is currently on death row. There have been no updates to this case about the fate of baby Shannon.

Most people around here think Gabrion either killed the baby or sold it. I believe Shannon is no longer alive.

I wander if they will show that episode on Spike anytime soon