Former MedImmune Exec Pleads Guilty A former executive of the biotechnology company MedImmune faces from 15 to 21 months in prison after pleading guilty Friday to security fraud and perjury in U.S. District Court in Washington. &lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2" color="#666666"&gt;&lt;B&gt;-AP&lt;/B&gt;&lt;/FONT&gt;