For years, Dr. H. Marc Watzman specialized in treating children, but federal prosecutors on Monday said he harbored a much darker interest in youngsters. Watzman, an anesthesiologist living in Chicago who worked at Edward Hospital in Naperville and others throughout the state, collected more than 3,000 computer images of child pornography, had erased roughly 200,000 other images out of his computer and kept a stash of drugs in his apartment designed to knock people out, plus Viagra, prosecutors said. Watzman, 37, of the 1400 block of North Wieland, even apparently took a laptop computer with child porn on it to...