Officials: Boy plotted to take class hostage By STEVEN MAYER and STEVE E. SWENSON, Californian staff writers e-mail: smayer@bakersfield.com e-mail: sswenson@bakersfield.com Friday September 27, 2002, 10:48:11 PM A plot by a 12-year-old seventh-grade boy to take a class hostage at knifepoint, sexually assault a girl and then kill himself was foiled moments before he intended to carry it out, Kern County sheriff's officials said at a news conference Friday. The potential tragedy at Sierra Middle School was avoided Thursday morning when another pupil saw the boy with a knife in his waistband and alerted the teacher, sheriff's Cmdr. Marty Williamson...