WOBURN – Prosecutors in the case of a teenager charged with fatally stabbing another student at a high school are asking a judge to allow them to use jailhouse recordings of the teen’s conversations with his parents at his upcoming trial. John Odgren’s lawyers contend he was legally insane when he randomly chose a victim at Lincoln-Sudbury High School and stabbed him repeatedly in a boys’ bathroom. James Alenson, 15, died in the 2007 attack. Prosecutors said jailhouse recordings of Odgren’s conversations with his parents show a lucid boy who was not in the throes of mental illness.

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