Locked up : Martin Alvarado Jr , 23 , allegedly repeatedly hit his girlfriend 's young son last week . A 23-year-old man beat his girlfriend 's 18-month-old son to death for urinating him as he changed the boy 's diaper , according to police . Martin Alvarado Jr. , from Cicero , Illinois , appeared in court on Monday on a first-degree murder charge for the death of Edwin Eli O'Reilly and has been ordered to be held without bail . He was watching Edwin at their home in Cicero last Thursday when the toddler urinated on him during a diaper change , according to authorities . Enraged , Alvarado allegedly repeatedly hit the little boy . Police and paramedics responded to the home following a call about an unresponsive child and Edwin was rushed to MacNeal Hospital in Berywn , where he later died . According to the Cook County Medical Examiner , the child suffered from multiple blunt force trauma and his death was ruled a homicide . During questioning , Alvarado allegedly confessed to the assault on videotape , the Chicago Tribune reported . An Illinois Department of Children and Family Services spokeswoman said the agency had prior contact with the family , but would not provide further details . Scene : He was looking after the boy at his home on this Cicero , Illinois block when he allegedly became enraged that the boy urinated on him during a diaper change . He allegedly admitted to the attack . Another , older child at the home was taken in by the Department of Children and Family Services . The girlfriend was not home at the time of the alleged attack . Alvarado was scheduled to appear for a bond hearing on Monday morning but it was delayed after he allegedly trashed his cell overnight , authorities told the New York Daily News . When he did appear in court , he was ordered to be held without bail by the judge . He is due back in court on April 28 .
Martin Alvarado , Jr. , 'was looking after Edwin O'Reilly on Monday and became enraged when the child urinated on him as he changed his diaper ' He 'confessed to police that he repeatedly struck the boy , killing him ' Alvarado is being held without bail on a first-degree murder charge .