Bio

Arthur Hans Halvorsen was born in 1942 and spent most of his adult life in Southern California. By the early 1980s, he was living in Long Beach, California, and had worked in the trucking industry, including a period of employment with Ted Hammett Vacuum Service in Wilmington.

In the years leading up to the crimes, Halvorsen experienced a series of personal and financial setbacks. He lost his job with the trucking company and became involved in unsuccessful business ventures and deteriorating relationships with business associates and acquaintances. According to testimony presented at trial, he increasingly blamed other people for his failures and became consumed by feelings of resentment and revenge.

Family members later testified that they had observed a significant change in his behavior before the shootings. They described him as depressed, paranoid, and emotionally unstable. He reportedly became increasingly isolated and exhibited erratic behavior and mood swings.

Psychiatric testimony introduced during the trial indicated that Halvorsen suffered from bipolar disorder and displayed symptoms of paranoia and depression. He also had a family history of mental illness and suicidal behavior. However, mental health experts did not conclude that he was legally insane or incapable of understanding his actions at the time of the offenses.

On March 31, 1985, witnesses saw Halvorsen drinking heavily at a bar for several hours. Testimony described him as loud, agitated, and behaving unpredictably. Later that same day, his frustrations and grievances culminated in a series of shootings that left two men dead and two others seriously wounded.

Following his convictions, Halvorsen spent nearly four decades in the California prison system. He remained incarcerated at San Quentin Rehabilitation Center under a condemned sentence. On August 3, 2024, Arthur Hans Halvorsen died of natural causes at the age of 82 while still in state custody.

Murder Story

On the afternoon of March 31, 1985, Arthur Hans Halvorsen spent several hours drinking at a Southern California bar while discussing business matters with an associate. During this time, he became upset over an air compressor that another man, Roberto Martinez, had allegedly promised to place in the back of his truck but failed to deliver.

After leaving the bar, Halvorsen drove to Martinez's residence in Long Beach. When he discovered that Martinez was not there, he encountered Martinez's brother-in-law, Benjamin Alcala, then 24 years old. Believing that Alcala was protecting Martinez and refusing to reveal his whereabouts, Halvorsen pulled out a handgun and shot him, seriously wounding him.

Halvorsen then left the scene and drove to Ted Hammett Vacuum Service at 903 McDonough Avenue in Wilmington, where he had previously worked and where he harbored resentment toward former co-workers.

Upon arriving at the business, he was approached by employee Calvin Ferguson, 42. Without warning, Halvorsen pointed a handgun at Ferguson and shot him in the chest, killing him.

After shooting Ferguson, Halvorsen drove away from the business. Truck driver Vicente Perez, 45, heard reports of the shooting over his radio and drove to assist Ferguson. As Perez approached in a vehicle marked "Community Alert Patrol," Halvorsen leaned out of his truck and fired a shot, striking Perez in the neck and killing him.

Following the second homicide, Halvorsen remained calm and reportedly laughed about the shootings. He then drove to the home of business associate Eugene Layton, 44, in Long Beach. Within moments of entering the residence, Halvorsen shot Layton in the chest.

Layton managed to fight back despite his injuries. During the struggle, he grabbed a piece of broken glass and slashed Halvorsen's throat. Both men survived the confrontation, and Halvorsen was taken into custody and transported to a hospital.

Authorities charged Halvorsen with two counts of first-degree murder for the killings of Calvin Ferguson and Vicente Perez, and two counts of attempted murder for the shootings of Benjamin Alcala and Eugene Layton.

At trial, prosecutors described Halvorsen as a frustrated and angry man who had become consumed by grievances against people he believed had wronged him. The defense argued that his actions were influenced by mental illness, alcohol abuse, and emotional instability.

The jury convicted Halvorsen of all charges. During the penalty proceedings, he repeatedly demanded that he be sentenced to death, telling the court, "I insist on it. Send me to the gas chamber. I'm going to call your bluff."

On November 18, 1988, he was sentenced to death. Years later, the California Supreme Court affirmed his convictions but overturned the death judgment after determining that the trial court had improperly denied his requests to represent himself during the penalty retrial.

Despite the reversal of the death sentence, Halvorsen remained imprisoned in California for the remainder of his life. He died of natural causes at San Quentin Rehabilitation Center on August 3, 2024, at the age of 82, bringing an end to one of California's notable multiple-murder cases of the 1980s.