As the star expert for the plaintiff firm Milberg Weiss, John Torkelsen became a legend for his ability to cap an all-night binge with a crack performance in a deposition the next morning.

But his latest hangover won’t be so easy to shake. As Torkelsen gets ready to start a five-year federal prison sentence — he pleaded guilty last year in a scheme to defraud the government of investment cash — he’s feeling the squeeze of L.A. federal prosecutors.