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East County News Service
April 16, 2024 (El Cajon) -- John Paul Campbell, 37, a suspect in the April 9 death of a homeless man in El Cajon was apprehended on April 12 by U.S. Customs and Border Protection Agents.
The victim, Robert Mansi, 41, was found by El Cajon Police officers responding to an assault near 100 West Main Street at 3 a.m. on April 9. He died at the scene with injuries consistent with blunt force trauma. His death has been classified as a homicide.

El Cajon Police detectives launched an investigation and quickly identified the suspect as 37-year-old John Paul Campbell, also a homeless man. Records checks of Campbell revealed he had been arrested by the San Diego County Sheriff’s Department on February 15, 2024, for assault with a deadly weapon and was booked into jail. He was released on April 8, just seven hours before the homicide occurred.
Campbell was on probation and had an extensive arrest record for violent crimes dating back to the early 2000s, says Captain Royal Bates with the El Cajon Police Dept.
A be-on-the-lookout flier for Campbell was distributed throughout San Diego County. On April 12, 2024, at approximately 2:00 PM, United States Customs and Border Protection agents detained Campbell when he attempted to cross into the United States at the San Ysidro Land Port of Entry. El Cajon Police detectives took Campbell into custody shortly thereafter and booked him into the San Diego County Central Jail for murder.   
The motive behind the homicide is unknown, and the investigation is ongoing.  Anyone with information regarding this case is urged to contact the El Cajon Police Department at (619) 579-3311. Alternatively, information can be shared anonymously through Crime Stoppers at (888)-580-8477 or online at www.sdcrimestoppers.org.

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