From left, Joshua Leo Johnson, 35, of Santa Rosa, Calif., surrendered himself at the Lake County Jail in Lakeport, Calif., on Sunday, September 4, 2011. He was being sought in connection with an assault on rival motorcycle gang members on June 4, 2011, in Lakeport. Still at large (right) is 41-year-old David Daniel Dabbs of Santa Rosa, Calif. Photos courtesy of the Lake County Sheriff's Office.

LAKE COUNTY, Calif. – A Sonoma County man being sought in connection with an alleged June 4 assault on two rival motorcycle gang members has turned himself in to authorities, but another man who allegedly was involved is still being sought.

Joshua Leo Johnson, 35, of Santa Rosa surrendered at the Lake County Jail at 7 p.m. Sunday, according to a report from Michelle Gonzalez of the Lake County Sheriff's Office.

Johnson, who the sheriff's office said is the vice president of the Sonoma County chapter of the Hells Angels, is being held on $500,000 bail for participating in a criminal street gang, and remains in custody pending a bail hearing.

Gonzalez said sheriff's detectives placed a “1275” hold on Johnson, which requires him to account for the origin of his bail.

Johnson is the third person to be arrested in the case. Nicolas Felipe Carrillo, 32, of Geyserville and 33-year-old Timothy Robert Bianchi of Petaluma, also alleged to be Hells Angels members, were arrested last month in Sonoma County following the service of search warrants, as Lake County News has reported.

Carrillo and Bianchi also are being held in the Lake County Jail with bail set at $500,000 each, with similar 1275 holds, according to jail records.

Still at large in the case is another alleged Hells Angels member, 41-year-old David Daniel Dabbs of Santa Rosa, who also is being sought on a no-bail warrant out of San Diego for alleged kidnapping and torture, Gonzalez said.

Dabbs should be considered armed and extremely dangerous, and officials have warned that members of the public should not attempt to approach or apprehend him.

The felony arrest warrants for the men were secured after a two-month investigation following a June 4 incident at Konocti Vista Casino in which the four allegedly beat 39-year-old Michael Burns – a validated Vagos motorcycle gang member – and 48-year-old Kristopher Perkin, Gonzalez said.

The entire incident was recorded on the casino’s video surveillance system, and the suspects were identified through the assistance of the FBI Safe Streets Task Force, Santa Rosa Police Department Gang Task Force and the Sonoma County Sheriff’s Department Gang Task Force, according to Gonzalez.

On Aug. 25 SWAT teams from the FBI, Santa Rosa Police Department and the Petaluma Police Department assisted Lake County Sheriff’s Office detectives in serving four arrest warrants and search warrants on members of the Sonoma County Hells Angels in Santa Rosa and Petaluma, which led to the arrests of Carrillo and Bianchi, Gonzalez said.

Bianchi was charged with assault with a deadly weapon, battery, fighting in a public place and a gang enhancement, while Gonzalez said Carrillo was charged with battery, fighting in a public place and a gang enhancement.

Anyone with information on the whereabouts of David Dabbs is encouraged to call local law enforcement or the Lake County Sheriff’s Office's Investigations Division at 707-262-4200.

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