VIENNA -- First he pulled a knife – and when that didn't work a would-be robber persuaded his victim to hand over money with a sob story.An Austrian police official said Thursday that a woman last month refused demands by a knife-wielding man to give him 400 euros ($570) from an ATM – but she then handed over 90 euros ($130) out of pity after he put away his weapon, took off his mask and told her that he was homeless and broke.Read More... More on Dumb Criminals