News Details

Five arrested in connection with homicide, separate assault at June concert

Months of investigation. Countless hours of work and follow-up. Coordination with local and federal partners. 

Today, we are pleased to announce that after five months of extensive work, and through collaboration with several law enforcement partners, five men have been arrested in connection with two separate incidents occurring at the Chris Stapleton concert at Shoreline Amphitheatre in June, one of which resulted in the death of a man.

On June 18 shortly before 10:45 pm, Mountain View officers responded to reports of a man who was found unresponsive near the Stage Right Cafe at the venue. Responding personnel, including Mountain View firefighters, attempted life-saving measures and the man was rushed to an area hospital for further treatment. Unfortunately, roughly a week later, the man – identified as 41-year-old Bakersfield resident Juan Gonzalez – succumbed to his injuries and died. 

Also during the concert that night, an off-duty police officer was brutally assaulted by a group of men near a collection of portable restrooms before they walked away from the area. 

Officers immediately began investigating that night and over the course of the next several days, investigators learned that all suspect parties involved seemed to know one another and appeared to be associated with the Hells Angels Motorcycle Club. 

“This was an extremely sensitive situation,” said Chief Chris Hsiung. “We knew early on that we needed to be meticulous and diligent in our pursuit of justice for the victims in these cases.”

Months of investigation ensued, with detectives and professional staff working around the clock – in addition to their other caseloads – to identify the suspects and build out an understanding of what led to one man’s death and the separate attack on the other victim.  In total, nearly five months of investigation were put into this case, along with several meetings to confer with the Santa Clara County District Attorney’s Office on best next steps. Federal partners, including the FBI and the ATF, were also consulted. 

Ultimately five men were identified as suspects in these cases. On Nov. 15, in coordination and collaboration with several local and federal partners, Mountain View teams executed arrest and search warrants at the homes of the suspects as well as a search warrant on the Hells Angels clubhouse in San Francisco. All suspects were arrested without incident. 

Immediately below is a list of the suspects arrested in connection with these two cases, as well as arresting charges: 

  • Dominic Guardado, 33, San Francisco resident: dissuading a witness to a crime
  • Julio Moran, 43, San Mateo resident: assault by means to likely to produce great bodily injury
  • David Wiesenhaven, 38, San Francisco resident: assault by means to likely to produce great bodily injury
  • Logan Winterton, 37, San Francisco resident: murder and assault by means to likely to produce great bodily injury
  • Raymond Cunanan, 42, Pleasant Hill resident: dissuading a witness to a crime and assault by means to likely to produce great bodily injury

“I am exceptionally grateful for the dedication and tenacity our detectives put into this case to bring justice to the victims involved,” said Chief Chris Hsiung. “I know many wanted answers and updates, and we appreciate your patience. Know that our team gave it their all to get us here today.”

We wanted to take a moment to thank all those who helped throughout this investigation and who especially made the operation today a success. Our sincere thanks to the San Francisco Police Department, the San Mateo Police Department, the San Mateo Gang Intelligence Unit, the Daly City Police Department, the Santa Clara County District Attorney’s Office Bureau of Investigation, the FBI, the ATF, the Antioch Police Department, the Sacramento County Sheriff’s Office, the San Jose Police Department, the Los Altos Police Department, the Central Contra Costa County Regional SWAT team and the Santa Clara County Specialized Enforcement Team.

Media inquiries and interview requests can be sent to PIO Katie Nelson at

Dominic Guardado


Julio Moran


David Wiesenhaven


Raymond Cunanan


*Please note, we do not have a booking photo for Logan Winterton at this time.*