wondering if shop is partly at fault for my thrown rod in block.

What is your question?

I had a tune up 2 weeks ago and a tranny flush & new filter w/in last 6 months. when I picked up car it made a ticking noise. they said it could be lifters, or 2 other things but not sure. 6 days ago I threw a rod into block. wondering if during tune up they should have noticed perhaps the rocker arms or valve condition since check engine light had been on.. is there more they could have done to help prevent this from happening?