DOS

Here is the situation. A buddy of mine brought his 7 yr old Trek Madone into the LBS to address balky rear shifting. LBS tells him he needs a new rear derailleur (NFI) and that his derailleur hanger needs straightening. Repairs done, we go out for long hard ride yesterday; heading up a hill, the newly straightened hanger snaps, destroying chain and taking chunks of carbon out of the sest stays, possibly destroying the frame. Seems perhaps the bent alu hanger was cracked either by the original bend or when the LBS straightened it (or both) and that it should have been replaced rather than straightened.

So what should my buddy expect/seek by way of restitution (if any) from LBS, Trek? Warranty frame replacement, discount on new bike, sincere apology?