The man identified in Thursday’s deadly shooting near a Washington, D.C., gym has been named as Dr. Matt Lambert, as investigators examine whether a long-running dispute involving his condominium’s homeowners association played a role in the violence.

Law enforcement officials identified Lambert as the suspected gunman in the November 12 shooting in the Logan Circle neighborhood, where one person was killed and four others were wounded.

Authorities said the violence began shortly before 8 a.m. at VIDA Fitness on 15th Street NW. Investigators believe Lambert entered the gym and fatally shot 46-year-old building manager James Stuart before additional gunfire left four other people wounded. One of the injured victims was reported to be in critical condition.

Police said Lambert had been involved in an ongoing conflict with the homeowners association and building management over conditions at his condominium, including allegations involving mold, moisture and water damage. Court records show Lambert had pursued civil litigation over the problems at his residence. Authorities are investigating whether that dispute was connected to the shooting.

Following the shootings, Lambert allegedly retreated to his seventh-floor condominium, triggering a major police response and lengthy standoff. Officers attempted to communicate with him before hearing a gunshot and entering the residence.

Police later found Lambert suffering from what authorities described as a self-inflicted gunshot wound. He died at the scene, bringing the standoff to an end. Investigators also recovered firearms from the residence.

The deadly attack sent shockwaves through the busy Logan Circle neighborhood and prompted temporary security measures at nearby schools while heavily armed officers secured the area.

Investigators are continuing to examine Lambert’s history with the condominium association, the civil dispute and other evidence as they work to establish the full circumstances that led to Thursday’s deadly attack.