Committed second murder of man who paid his bail for the first murder

Fled to Mexico; multi-agency effort

Faces mandatory life without parole

By Solano County District Attorney’s Office

On April 21, 2026, in Department 23 of the Solano County Superior Court, before the Honorable John Ellis presiding, a Solano County jury found Defendant Richard Raymond Klein, age 55 of Martinez, guilty as charged: Two counts of First-Degree Murder in violation of Penal Code Section 187(a) and two counts of Felon in Possession of a Firearm. The jury further found the following enhancements to be TRUE: Use of a Firearm Causing Death, Committing Murder While Out of Custody on Own Recognizance, and Multiple Murder Special Circumstance

The conviction followed a seven-week trial that detailed a 2022 killing and a subsequent fatal shooting tied to a key witness who paid for Klein’s bail following his first murder arrest.

In early 2022, Defendant was engaged in an ongoing dispute with Anthony Raymond Fuimaono (“Manny”) over the theft of narcotics. On April 21, 2022, Anthony Siu Fuimaono, Manny’s father, was together with friends playing dice outside a home in Fairfield when Defendant Klein showed up there. An argument ensued and suddenly Defendant Klein pulled out a gun and shot and killed Anthony Siu Fuimaono who was unarmed. After committing the murder, Defendant Klein fled to Tracy, California. There, he stayed with a friend and associate, Matthew Muller (“Mr. Muller”), and had him discard his .45 caliber semi-automatic handgun that was used in the murder.

On May 5, 2022, Defendant Klein was arrested for the murder of Anthony Siu Fuimaono. In July 2022, Defendant Klein learned that Mr. Muller was talking to mutual associates about still being in possession of the murder weapon that killed Anthony Siu Fuimaono, and heard that he was scheming to steal property from his garage. While in custody, Klein conspired with two associates during recorded jail calls to set Mr. Muller’s home in Suisun City on fire. On July 18, 2022, Mr. Muller’s home burnt down and Klein’s associates were convicted at trial.

On October 28, 2022, at the conclusion of a preliminary hearing, Defendant Klein was held to answer for the murder of Anthony Siu Fuimaono. He was scheduled to return to court for a Bail Hearing and Arraignment on the information on November 14, 2022. On November 9, 2022, Defendant Klein spoke to Mr. Muller. In that recorded jail call, Mr. Muller offered to pay Mr. Klein’s $450,000 bail money with the assurance that Mr. Klein would not come after him if released. On November 14, 2022, the Court released Defendant Klein from custody on pre-trial services over the People’s strenuous objection. At the prosecutor’s request, Defendant was required to wear a GPS ankle monitor.

On December 15, 2022, Defendant Klein and an associate drove to Mr. Muller’s new home in Suisun City, CA. Defendant parked his car and got out with a firearm and confronted Mr. Muller, who was sitting in the driver’s seat of a car parked in front of his house. A gunfight ensued and Klein shot and fatally wounded Mr. Muller. Klein cut off his ankle monitor and fled to Rosarita, Mexico.

Due to the diligent response of local, state, and federal law enforcement, Defendant Klein was apprehended in Mexico on January 7, 2023. Defendant was brought back to Solano County where he faced additional charges for the murder of Matthew Muller.

During the seven-week jury trial, Deputy District Attorney Barry Shapiro called over 40 witnesses to the stand to testify. He put on several key pieces of evidence including DNA, ballistics, GPS, surveillance recordings and recorded jail conversations. After hearing voluminous testimony, the jury deliberated and found Defendant Klein Guilty. The defendant is scheduled to return to court on June 26, 2026, at 8:30 a.m. in Department 23, for Judgment and Sentencing. Defendant faces a mandatory sentence of Life Without the Possibility of Parole.

Deputy District Attorney Barry Shapiro prosecuted the case, with the assistance of District Attorney Investigator Jason Thompson, Supervising Victim Advocate Jeff Lelea, and Clerical Supervisor Carlos Noriega.

Our office would like to extend our appreciation and say thank you to our law enforcement partners, specifically, Fairfield Police Department, Suisun Police Department, California Highway Patrol, California Department of Justice, Sonoma County Sheriff’s Office, Solano County Major Crimes Task Force and the U.S. Marshall’s Office, for their hard work and vigilance in this case. This was a multi-jurisdictional investigation that led to the apprehension, arrest, prosecution, and conviction of Defendant Richard Klein.

According to localcrimenews.com, the 280-pound Klein was also arrested in 2020 by Contra Costa CHP for an illegal speed contest. According to the Solano County Sheriff’s Office, he was born on March 20, 1971.

Case: People v. Richard Klein, F23-00728

Allen D. Payton contributed to this report.