OAKLYN, N.J. - Matthew Lovett was known as an angry young man: He dressed all in black, drew violent pictures and walked around town with a baseball bat. Acquaintances said he kept a list of people who had teased him as far back as grade school. Early Sunday, Lovett, 18, was arrested with two other teenagers on charges they plotted to kill three teens and open fire randomly on other people with a cache of guns and ammunition they were carrying. Lovett was being held on $1 million bail Monday. Authorities would not discuss a possible motive, but people who...