A Bay Park family tragedy has now turned into a courtroom showdown, as the adult sons of Monica Coates sue their own father over the house where she died.
Yesterday, Nicholas and Neil Coates filed a wrongful-death lawsuit against their father, Stephen Coates, seeking ownership of the Bay Park home where their mother was killed. The civil case stems from a December 29, 2025 incident that San Diego police say began when a pickup truck struck the house and a small fire broke out, leaving Monica dead and Stephen seriously burned. The lawsuit lands while prosecutors and investigators continue to pursue criminal charges in the case.
According to CBS 8, the brothers filed the suit in San Diego Superior Court, asking a judge to give them control of the Bay Park property and to resolve estate issues connected to their mother's death. Their attorney, Dick Semerdjian, told CBS 8 that no lawsuit or money could ever compensate them for their "unfathomable loss" and said the civil action is intended to resolve ownership and related legal matters.
Police say the case began when neighbors reported a white pickup hitting a house and hearing people screaming inside. Officers who went into the home found Monica Coates dead and Stephen Coates suffering from burn injuries, according to reporting by NBC 7 San Diego. Homicide detectives and the San Diego Metro Arson Strike Team took over, and the medical examiner later reviewed the cause of death.
Court records show Monica had sought a temporary restraining order against Stephen in late November, writing that his paranoia had made him erratic and that she feared for her safety. Those filings also state that officers and psychiatric emergency response teams had previously removed Stephen from the home, as reported by the Times of San Diego. The restraining order details and the psychiatric hold are now folded into both the criminal investigation and the civil case the family is pressing forward.
What the lawsuit alleges
The civil complaint asks the court to declare Nicholas and Neil Coates the proper parties to control and manage the family residence and related estate matters while the criminal case moves ahead, according to CBS 8. The filing casts the request as both legal housekeeping and a way to ensure the home and any assets are handled on behalf of Monica's heirs.
Criminal case remains separate
San Diego police and prosecutors say Stephen Coates was detained and later booked on homicide and arson-related allegations. The criminal complaint includes severe special circumstance claims, according to local reporting by NBC 7 San Diego.
The criminal proceedings, which run separately from the wrongful-death suit, are moving through the courts as investigators gather evidence. Prosecutors have indicated they are pursuing the most serious charges available under the circumstances.
In the days after Monica's death, neighbors placed flowers and candles outside the home, and a GoFundMe to support her sons began circulating in the community, local outlets reported. Anyone with information about the case is asked to contact the San Diego Police Department Homicide Unit or Crime Stoppers, according to the Times of San Diego.
