Like Doomer said last chapter, though, instead of saving him he could've just pretended he had nothing that could help
Sure, it'd probably weigh on his conscience, and that's why he didn't, but it would sure save him from a lot of future headaches
Although... would he be accused of being an accessory to manslaughter if whatever-the-noble's-warriors learn that he has Petrify-curing potions? That remains up in the air I suppose