Stephen Coates faces first-degree murder charges for allegedly driving his truck into their Bay Park home and starting a fire that killed his wife, Monica Coates, on December 29, 2025. Police confirmed Monica had a temporary restraining order against him, citing his paranoia and threats. No major case developments appear beyond his December 31 booking and hospital arraignment as of early 2026.​
Incident Details
On December 29, around 7:30 a.m., Monica called 911 reporting the crash; neighbors heard screams. Officers entered the smoke-filled home, finding Monica dead in the bedroom from burn injuries and Stephen injured in the bathroom; he received aid and hospital transport. Firefighters extinguished the blaze, and investigators linked Stephen to both the crash and arson.​
Prior Restraining Order
Monica filed in November 2025, describing Stephen’s paranoia—he believed she conspired to kill him, demanded phone searches, body inspections, and considered arming himself. She fled after he “booby-trapped” the home, leading to his psychiatric hold; a one-year order started December 1. She feared further harm in his mental state.​
Charges and Penalties
Stephen was arraigned from the hospital on murder with special circumstances of arson, mayhem, intentional killing, and torture. Conviction could mean death or 25 years to life, per the San Diego DA. Jail records confirm his booking; he’s in custody post-hospitalization.​
Investigation Contacts
SDPD Homicide Unit leads, with Metro Arson Strike Team on the fire; call 619-531-2293 or Crime Stoppers at 888-580-8477 for tips. Toxicology and cause of death reports remain pending. A GoFundMe supports their sons’ funeral costs.
