Morton High School en Morton High School placed on lockdown <p><span style="line-height: 1.5;">Morton High School was under lockdown today for about an hour following a written threat of violence. The hard lockdown was put into effect at 10:20 this morning. The school transitioned to a soft lockdown by 11 and moved to an all-clear level by 11:20 when the schedule resumed as normal. A student is in custody and Morton Police continue to investigate.&nbsp;</span></p><p></p><div>&nbsp;</div> Tue, 21 May 2013 17:43:23 +0000 Denise Molina 5956 at Morton High School placed on lockdown