Aaron Farinacci, the Old Trails Fire suspect now sitting in a Spokane County jail cell, was already known to the criminal justice system long before his name surfaced in Washington state. Court records from Arizona show the 37-year-old pleaded guilty to shooting and killing his adoptive father inside the family home more than a decade ago, a case that ended with a manslaughter conviction and a prison term.

That history has now collided with an active investigation into a blaze that reshaped the landscape north of Spokane and displaced tens of thousands of residents in a matter of days.

What Investigators Say Happened

Farinacci was taken into custody on Monday, Aug. 3, by deputies with the Spokane County Sheriff’s Office and booked on an arson allegation. Investigators have accused him of setting the Old Trails Fire “knowingly and maliciously,” language that signals prosecutors believe the ignition was deliberate rather than careless.

At a press conference announcing the arrest, Sheriff John Nowels laid out the basic outline of the case. He described Farinacci as a convicted felon out of Arizona and credited major crimes detectives with identifying him and assembling probable cause. According to the sheriff, investigators traced the fire’s point of origin to the precise spot where witnesses had reported seeing Farinacci kneeling in dry grass earlier that same day.

That overlap between witness accounts and the physical origin point appears to be the backbone of the case so far. Fire origin analysis is painstaking work. Investigators typically read burn patterns, char depth, and the direction vegetation was scorched to work backward toward a single ignition area, then compare that area against timelines, tips, and surveillance.

He appeared before a Spokane County judge on Tuesday. Bond was set at $1 million, an unusually steep figure that reflects both the scale of the alleged damage and the defendant’s prior felony record.

The 2010 Arizona Shooting

The Arizona case that shadows Farinacci today began with something almost mundane. He was 21 at the time, in the dining room with his mother and adoptive father, when an argument broke out over doing the dishes.

According to records, Farinacci left the room and went into his parents’ bedroom. His father followed and used a key to open the door. Farinacci then took hold of a firearm kept inside the room and fired, hitting his father in the face. As his father turned to leave, he was shot again in the back.

Farinacci fled the scene and then turned the same weapon on himself, firing into his own chest.

When he spoke with police afterward, he described the shooting as an accident. He also told investigators he believed he deserved a prison sentence, saying he had taken a life.

In 2012 he was convicted of manslaughter and aggravated assault. He was released from custody in 2020 and discharged from probation supervision in 2024. By that point, records indicate he had relocated to Washington state and was living with a girlfriend.

A Fire Without Precedent in Spokane

The scale of the Old Trails Fire is what has made this case a statewide story rather than a local police blotter item.

The blaze ignited on Saturday and expanded with terrifying speed. It now stands as the most destructive fire in Spokane’s recorded history. Here is what that meant on the ground:

More than 60,000 people were placed under evacuation orders, uprooting entire neighborhoods in a matter of hours.

At least 700 homes were destroyed, a figure that is likely to shift as damage assessment teams complete their surveys.

Emergency shelters, road closures, and air quality warnings rippled outward across the wider region.

For a county that has grown accustomed to smoke season, the difference this time was proximity. This was not a remote backcountry burn consuming timber. It moved into residential areas, and the losses were measured in family homes rather than acres alone.

What Comes Next in the Case

An arrest is not a conviction, and it is worth stating plainly that the allegations against Farinacci remain unproven. He has not entered a plea to the arson allegation, and the case will now move through the standard sequence of charging decisions, evidentiary hearings, and potential trial.

Arson prosecutions involving large wildfires are among the more complex cases prosecutors handle. Establishing that a fire was intentionally set is one hurdle. Tying a specific individual to that ignition beyond reasonable doubt is another entirely, and it usually requires a combination of physical evidence, witness testimony, digital records such as phone location data, and sometimes statements from the defendant.

Prosecutors may also weigh additional charges depending on what the investigation produces, particularly given the destruction of hundreds of residences and the enormous cost of the emergency response.

Why This Case Has Struck a Nerve

Beyond the legal mechanics, this story has landed hard in Spokane for reasons that are easy to understand. Thousands of families are staying with relatives, in hotels, or in shelters. Many have already returned to find nothing but foundations. The idea that so much loss could trace back to a single deliberate act is difficult for a community to absorb.

Farinacci’s criminal history has intensified that reaction. Questions about supervision, about how people convicted of violent offenses are monitored after release, and about what warning signs might have existed are already circulating.

Those conversations will continue. For now, the immediate priorities remain containment of the fire, support for displaced residents, and a criminal case that is only just beginning.