Crime Solvers Central
CSC
263 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.
John Vallejos death by force case profile photo

John Vallejos

Case from Cupertino, CA dated Oct 05, 2011

Victim Details

John Vallejos

Male

Cupertino

CA

2011-10-05

51

John

Vallejos

06/25/2026

Case Description

Any updates on this case? Let us know!
John Vallejos, aged 51, tragically lost his life on October 5, 2011, in a horrific shooting incident at the Lehigh Southwest Cement Permanente Plant in Cupertino, California. Vallejos was one of three victims killed in a rampage carried out by Shareef Allman, a disgruntled employee of the plant. The incident occurred during an early morning meeting to discuss safety issues, where Allman opened fire on his colleagues using a .223-caliber semi-automatic rifle and a .40-caliber handgun. Vallejos, a ...
MEMBER ACCESS

Continue reading the complete case summary

Unlock the full case narrative for John Vallejos, all available source links, additional videos, and member discussions.

Unlock Full Case Access — $3.97/month
Cancel anytime.
Already a member? Log in

Links to Additional Sources (8)

See any mistakes? Let us know!
  • The Mercury News: Funerals today for 2 Cupertino cement plant shooting victims
  • Gunman Escapes After Killing 3, Wounding 7 In Cupertino Quarry ...
    • MEMBER ACCESS

    Unlock 6 additional sources

    View the complete collection of available reporting and reference links for this case.

    View All Case Sources — $3.97/month
    Cancel anytime.
    Already a member? Log in

    Latest News

    View All

    Forum Posts (1)

    I’ve been thinking a lot about the broader effects of workplace violence, especially after learnin... ...Read More
    11/01/2023
    MEMBER ACCESS

    Join the discussion for John Vallejos

    Read full forum posts and contribute to this case discussion.

    Unlock forum access — $3.97/month
    Already a member? Log in

    Other Cases from Cupertino, California

    Richard Agpawa death by force case in Cupertino, CA

    Richard Agpawa

    Death: Jan 13, 2025
    Richard Agpawa, a 41-year-old man from Oakley, California, tragically lost his life on January 13, 2 ...Read More
    Manuel Piñon death by force case in Cupertino, CA

    Manuel Piñon

    Death: Oct 05, 2011
    Manuel Guadalupe Piñon, aged 48, tragically lost his life on October 5, 2011, in Cupertino, Califor o ...Read More