John D'Alessandro


Mr. D’Alessandro is a member of the firm and its trial team.  His  practice is primarily devoted to Public Sector Labor and Criminal Defense. He serves as counsel to the New York City Sergeants Benevolent Association as well as numerous Police Unions throughout Westchester and Putnam Counties where he handles  all Labor, Disciplinary and Criminal matters

Mr. D'Alessandro has served as co-counsel in numerous high profile acquittals in both State and Federal court. Here are some to name a few.

  • The 2018 acquittal of New York City Police Department Sgt. Hugh Barry who was charged with Murder in connection to the self defense killing of a bat wielding, 66 year old woman in the Bronx. This case was followed by national media.

  • The acquittal of Village of Mt. Kisco Police Officer George Bubaris, charged with Manslaughter in the Second Degree in the alleged beating death of homeless immigrant Renee Perez – a case that was followed in the national media.


  • The acquittal of Yonkers Police Officer Wayne Simoes, accused by the United States Attorney of the Southern District of New York of violating the civil rights of Irma Marquez by slamming her to the ground in a videotaped incident – also followed in the national media.


  • The acquittal of Sleepy Hollow Police Officer Jose Quinoy, accused by the United States Attorney’s Office with violating the civil rights of two residents of the Village, a case in which D'Alessandro and Andrew Quinn established that the FBI agent assigned to the Quinoy investigation destroyed evidence and perjured herself in an attempt to falsely convict the officer.


Prior to joining The Quinn Law Firm, Mr. D'Alessandro served over twenty years with the City of Yonkers Police Department, retiring as a Detective Sergeant. During his tenure as a detective and homicide investigator he investigated, supervised or assisted in over 100 homicide or suspicious death investigations. In 1996 he reopened the 1988 unsolved murder of a fourteen year old girl. During the course of a four year investigation the murder was linked to two other unsolved sexual murders. Working in collaboration with numerous detectives and prosecutors the case culminated in the arrest and prosecution of a serial killer.


His  work was profiled on the television show "Cold Case Files". Prior to retiring from the police department he  served as the Commanding Officer of the Westchester County Child Abuse Investigation Team, a multi-disciplinary team developed to more comprehensively investigate child abuse and neglect.  In that capacity he was responsible to command and coordinate the law enforcement component of the team. He also served as liaison to 43 police departments.

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