A Greenwich resident thought to be a primary suspect by the Greenwich Police Department in the disappearance/murder of 13-year old Matthew Margolies had a criminal complaint filed against him a few weeks prior to the 1984 Labor Day weekend murder of the Margolies boy.

The 16-year old individual was arrested on an assault charge after allegedly beating up another 13-year old boy not far from where the Margolies family resided.

The suspect and the young victim had gone to a vacant house owned by the suspect's family on his suggestion that they get some sodas. Ordered into the bathroom by the older boy the victim refused whereupon he was grabbed by the neck, throttled, then forced into the bathroom and punched in the face. What transpired afterwards was not publicly revealed at the time but it was reported that the boy was told by his assailant to explain that his injuries were a result of a bicycle accident.

When the police followed up on the complaint by the victim's family the suspect told them he had taken the younger boy to the house to clean up the wounds suffered by the purported bicycle accident. Due to the fact that the suspect was a juvenile adjudication of the charges were sealed.

No one has been indicted or arrested in the 18-year old murder of Matthew Margolies.