Bio

Dung D. Trinh was born in 1957. He was a Vietnamese immigrant who came to the United States. Early details about his childhood and upbringing are not very clear.

Trinh lived with his mother, Mot Trinh. He took on the role of caregiver for her. He worked as a chef before he decided to focus on taking care of her full-time. Dung was known to be quiet and well-mannered by some people who interacted with him, such as Huong Nguyen, an office manager at a medical office. She mentioned that he helped others, including moving a patient into a new house.

As time went on, Dung's mother became ill. She had diabetes and suffered complications from a broken hip after surgery. Dung held a strong belief that hospital staff had treated her poorly, especially during her visits to West Anaheim Medical Center. He felt that his mother's appearance may have affected the care she received. Dung had tattoos, and he thought that hospital workers saw him as a gang member based on his looks.

On September 14, 1999, his mother died from a heart attack at another hospital. Hours later, Dung made a decision that would change everything. He went to West Anaheim Medical Center, the hospital he blamed for his mother’s death, to confront the staff he believed were responsible. This led to tragic events later that day.

Murder Story

On September 15, 1999, Dung Trinh carried out a shooting at the West Anaheim Medical Center in California, resulting in the deaths of three hospital workers. This event occurred just hours after the death of Trinh’s mother, who had died due to complications from diabetes at another hospital. Trinh believed that the staff at the West Anaheim Medical Center had mistreated his mother during her earlier treatments and held them responsible for her death.

Armed with two .38 caliber revolvers and multiple rounds of ammunition, Trinh entered the hospital and targeted the employees he held accountable. He first shot nurse’s aide Marlene Mustaffa, aged 60, pharmacist Vincent Rosetti, aged 50, and maintenance director Ronald Robertson, aged 50. Robertson attempted to tackle Trinh in an effort to restrain him before further harm could be done.

The police apprehended Trinh on the same day of the shooting. Witnesses reported his belief that his mother had received poor care due to his appearance, which he thought influenced the hospital staff's treatment of her. Trinh had undergone significant emotional distress due to his mother's death and claimed that he felt compelled to seek revenge against the hospital.

In the aftermath of the shooting, Trinh was convicted of three counts of first-degree murder and one count of attempted murder. During the trials, some jurors initially favored a life sentence without parole, but a third jury ultimately sentenced him to death in March 2003. Trinh expressed no remorse and stated that he desired the death penalty, believing he deserved it for his actions. The judicial process included multiple trials and deliberations, with the final verdict concluding a complex legal battle surrounding his responsibility and emotional state at the time of the murders.