A California-based doctor who was found dead in her home after a house fire was murdered by her estranged husband, prosecutors said.

The Los Angeles County District Attorney’s Office released a statement on Tuesday announcing that 62-year-old Yoon Lai has been charged with the murder of his wife, 56-year-old Dr. Irene Gaw-Gonzalo. This comes months after she was discovered deceased in a house fire. Lai also faces charges of arson in connection with the fire at their San Marino residence, an act allegedly intended to conceal the murder.

While no motive was provided by authorities, the couple was reportedly in the process of divorcing.

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The Los Angeles Times reported that an investigation was initiated by Los Angeles County Sheriff’s detectives shortly after the fire on January 6. Due to the severe burns on Gaw-Gonzalo’s remains, found at the home’s entrance, the medical examiner was unable to determine the exact cause of death. Her manner of death was also listed as undetermined, based on findings by local CBS affiliate KCAL.

When Gaw-Gonzalo’s burned body was found to have evidence of additional physical trauma, detectives investigated her death as a homicide.

“The violent death of Dr. Irene Gaw-Lai is heartbreaking and deeply disturbing,” stated District Attorney Nathan J. Hochman. “She was not only a respected physician and business leader, but also a mother who deserved safety and dignity within her own home. We are committed to ensuring that the individual responsible for this senseless act is fully held accountable.”