LOWELL – Four defendants who have been charged in connection with the July 7 murder of Quintin Koehler, 22, of Billerica, were arraigned today in Middlesex Superior Court, Middlesex District Attorney Gerry Leone informed the public today.

The four defendants are:

• Adam Bradley, 27, of Lynn, was arraigned on charges of murder, attempted armed robbery, home invasion, and possession of a firearm.

• Peter Bin, 25, of Peabody, was arraigned on charges of murder, attempted armed robbery, home invasion, and possession of a firearm.

• Jason Estabrook, 28, of Lynn, was arraigned on charges of murder, home invasion, attempted armed robbery, and unlawful possession of a firearm.

• Gabriel Arias, 20, of Lynn, was arraigned on charges of misleading a criminal proceeding.

The four defendants were arraigned today in Middlesex Superior Court.  Middlesex Superior Court Clerk Magistrate Michael Sullivan ordered Bradley, Bin and Estabrook held without bail.  Middlesex Superior Court Judge Garry Inge ordered Arias held on $50,000 cash bail.

The defendants’ next court date is February 11 for a pre-trial hearing.

The four defendants are accused of shooting Koehler during an attempt to rob the victim while breaking into his home in Billerica.

According to authorities, on July 7 at approximately 3:55 a.m. Billerica Police responded to 795 Boston Road for a report of a shooting.  Officers discovered the victim, Quintin Koehler, evidencing a gunshot wound.  The victim was transported to Lahey Clinic where he was pronounced dead.  The Office of the Chief Medical Examiner determined the cause of death to be a gunshot wound to the head and the manner of death to be homicide.

It is alleged that Bradley and co-defendants were looking for a person to rob and together agreed to rob the victim.  Bradley, Estabrook, Bin, Arias and others traveled from Lynn to Billerica in the early morning of July 7 with the intent to rob the victim.  Authorities believe the home was targeted because the defendants believed marijuana and money would be present at the home.  The victim and a witness heard the defendant and others in the home and discovered Bradley, Estabrook, and Bin in the kitchen where an assault ensued.  It is alleged that gunshots were fired, hitting the victim in the head.  The suspects then fled the scene.

Authorities allege that Arias misled investigators during the investigation by providing false information to the police.

Bin was arrested October 26 and has been held without bail following his arraignment in Lowell District Court.   Estabrook and Arias were arraigned September 27 in Lowell District Court.  Lowell District Court Judge Thomas Brennan ordered Estabrook held without bail.  Judge Brennan ordered Arias held on $20,000 cash bail.  Arias was also held on a probation warrant from a case out of Lynn.  Bradley has been held on unrelated charges out of Essex County.  All four were indicted by a Middlesex Grand Jury on December 7.

These charges are allegations and the defendants are presumed innocent until proven guilty.

The case is being investigated by Billerica Police and State Police assigned to the Middlesex District Attorney’s Office.

The Assistant District Attorney assigned to the case is Cara Krysil.  The Victim Witness Advocate is Kathleen Keefe.

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