Convicted murderer confesses to 3 cold-case killings, police say
Long Beach police announced eight new charges against Glenn Cox, 39, who is already in prison, for his involvement in gang-related murders between 2004 and 2007.
An Avenal State Prison inmate already convicted of murder has confessed to three cold-case killings in Long Beach between 2004 and 2007, police said Friday.
Long Beach police say Glenn Cox, 39, was booked on Oct. 17 for three counts of murder, three counts of attempted murder and two counts of possession of a firearm by a person with a prior felony conviction, police added.
Cox is already serving multiple life sentences for a separate murder and attempted murder case, according to authorities.
In December 2023, Cox confessed to multiple murders and an attempted murder to Avenal State Prison personnel, who then told the LBPD, police said. After interviewing Cox, LBPD homicide detectives obtained confessions to three cold-case killings, police added.
Long Beach police said detectives also discovered corroborating evidence for Cox's confessions, but did not elaborate on it in their Friday statement.
LBPD detectives say Cox confessed involvement in the following killings:
- The Dec. 20, 2004 fatal shooting of Carlos Serrano, 22, and Jermy Kershaw, 23, and the wounding of two other men in the 100 Block of East Pleasant Street.
- The Feb. 16, 2007 fatal shooting of Dino Marks, 31, in the 1700 Block of Cherry Avenue.
- The Aug. 26, 2007 fatal shooting of an unidentified man on a bicycle in the 1000 Block of East Pacific Coast Highway.
LBPD detectives believe these killings were gang related, police said. A gang-related crime is one committed for the benefit of, at the direction of or in association with any criminal street gang, according to the LBPD.
Detectives presented all three cases to the Los Angeles County District Attorney’s Office for filing consideration, police said.
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