Allen Ivanov pleads guilty in triple fatal Mukilteo shooting

Allen Ivanov, the man charged with killing three people and wounding one other at a July house party in Mukilteo, pleaded guilty Monday — one day before the Snohomish County Prosecutor was expected to give his decision on the death penalty.

Sentencing is scheduled for Jan. 12, 2017.

Authorities had the 19-year-old male suspect in custody about two hours after the shooting. He was not immediately identified. Based on witness descriptions, police spokesman Officer Myron Travis said the suspect appeared to be the lone gunman.

He was apprehended by authorities while traveling south on Interstate 5 in Lewis County, about 100 miles south of the city. Local authorities stopped the vehicle he was driving, which matched the one described by witnesses, after Mukilteo police shared suspect descriptions with local agencies, Travis said at a news conference Saturday morning.

The Snohomish County Jail’s roster the following Saturday afternoon showed that 19-year-old Allen Christopher Ivanov was being held for investigation of three counts of murder, including one count of aggravated murder, according to the Associated Press.

Ivanov was formally charged with the murders on Aug. 2.

Prosecutors filed three charges of aggravated first-degree murder against Ivanov. He also faces one charge of attempted murder, alleging that he shot and seriously injured an 18-year-old man, and one of first-degree assault.

On Aug. 22, Ivanov pleaded not guilty to the charges. But on Monday, Dec. 19, Ivanov changed his plea to guilty.