article_snippet: A Massachusetts teenager's confession to police that A Massachusetts teenager killed A Massachusetts teenager math teacher cannot be used in A Massachusetts teenager murder trial, a judge ruled Tuesday even as A Massachusetts teenager allowed a bloody box cutter and other key pieces of evidence to be admitted.
article_snippet: Confession not admissible: Philip Chism - seen here in a Massachusetts court in January - confessed to police that he killed his math teacherhe , however a judge has ruled it cannot be used in he murder trial .
highlights_snippet: Judge ruled Tuesday that a taped police confession is now not admissible .
  