article_snippet.sent: Locked up: Martin Alvarado Jr, 23, allegedly repeatedly hit He girlfriend's young son last week .
article_snippet.sent: Martin Alvarado Jr., from Cicero, Illinois, appeared in court on Monday on a first-degree murder charge for the death ofEdwin O'Reilly and has been ordered to be held without bail.
article_snippet.sent: Enraged, him'
  Alvarado allegedly repeatedly hit the boy.
article_snippet.sent: him'
  Alvarado was scheduled to appear for a bond hearing on Monday morning but it was delayed after him'
  Alvarado allegedly trashed him'
  Alvarado cell overnight, authorities told the New York Daily News.
article_snippet.sent: When him'
  Alvarado did appear in court, him'
  Alvarado was ordered to be held without bail by the judge.
article_snippet.sent: him'
  Alvarado is due back in court on April 28.
highlights_snippet.sent: He 'confessed to police that He repeatedly struck the boy, killing him'
  Alvarado is being held without bail on a first-degree murder charge .