<p>FREDERICK, Md. - Bruce E. Ivins was a juggler, a gardener, a church musician, a Red Cross volunteer — and a suspected multiple murderer, according to federal authorities.</p>
<p>Some people who knew him scoffed at the government’s assertion that Ivins sent the anthrax letters that killed five people and sickened 17 in the fall of 2001. But court documents indicate the outwardly mild-mannered Ivins had a menacing side.</p>