Today I washed a new t-shirt of my son's. In the next wash I washed a new turtleneck of mine and the black dye from his t transfered all over the turtle. In the wash after that I washed a new green Lacoste shirt of my son's with the same problem.
Now the turtleneck, while disappointing, was not expensive so just sigh. His Lacoste shirt though I really really need to save.

I left in soaking in a sinkful of water with some Lestoil with no improvement.

Any ideas?

Tia