RICHMOND, Va. - A university student appears to be responsible for an advertising class assignment that went awry when the teacher's pug was threatened to be killed online, the school said. Virginia Commonwealth University had previously said it did not suspect a student was behind the posting on networking site MySpace.com in which someone identifying himself as Jason threatened to kill the pug, Oscar, online this week. The school later traced the postings to a school computer. It refused to identify the suspect because of federal privacy laws regarding students. Mike Lear, an adjunct professor at VCU's Adcenter, last week...