That is a poor excuse! I don't care if they can't find his veins, I doubt they are that hard to find. My veins are extremely hard to find, even during pregnancy and I'm not overweight, just was born that way. Guess what would have been the labs solution if they couldn't draw blood the normal way? They would have put in a pickline in the upper arm that would allow them to draw blood and insert IV at any time. My OB didn't give them permission to do that and after 13 tries and 6 different lab techs they finally got enough blood for their tests.
So, put a pickline on that jerk and he is ready for execution! I doubt the girls he violated would have been able to use that same excuse to save their own lives.