Jose A. Alvarado-Ramirez, 31, of Waukegan.

A 31-year-old man was charged with killing his ex-wife inside a vehicle in Waukegan Sunday morning and then calling 911 to ask for an ambulance, police said.

The Waukegan Police Department and Waukegan Fire Department responded around 6:45 a.m. Sunday to the 500 block of Lakehurst Road.

Dispatchers received a 911 call from 31-year-old Jose A. Alvarado-Ramirez reporting that his ex-wife was unresponsive inside a vehicle.

Waukegan Police Commander Edgar Navarro said officers responded and located the female unresponsive in a parked white sedan.

Paramedics arrived and determined the woman was dead at the scene. The Major Crime Scene Unit and Criminal Investigations Division (CID) detectives were called to investigate.

Detectives interviewed Alvarado-Ramirez, who lives in the 500 block of Lakehurst Road, which is the same block where the murder occurred. Detectives learned he was the victim’s estranged ex-husband.

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Police conferred with the Lake County State’s Attorney’s Office based on the evidence and they approved first-degree murder charges against the man.

The Lake County Coroner’s Office conducted an autopsy on the victim on Monday. A preliminary report showed the woman suffered sharp-force injuries.

An official cause of death will be released soon and the woman’s identity will also be released once proper family notifications are completed, Navarro said.

Navarro did not release the circumstances leading up to the murder but did say detectives are classifying it as a domestic violence-related incident. A preliminary hearing is scheduled for March 9.

Alvarado-Ramirez is being held in the Lake County jail on a $2 million bond. He will be required to post $200,000 cash in order to be released on bail.