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207 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

David OSullivan

Missing
Case Description
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David O'Sullivan, a 25-year-old Irish national, went missing on April 7, 2017, while hiking the Pacific Crest Trail (PCT). He had been undertaking a long-distance thru-hike, starting from the Mexico-California border and aiming to reach Canada. On April 6, O'Sullivan sent an email to his family from a library in Idyllwild, California, a town in the San Jacinto Mountains. The following day, he was last seen checking out of the Idyllwild Inn, after which he intended to continue his hike northward ...Read More
Last Seen: Apr 07, 2017
Links to Additional Sources (9)
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  • It's been five years since hiker David O'Sullivan disappeared
  • David O'Sullivan - MISSING FROM THE PACIFIC CREST TRAIL
    •     ...View 7 additional sources
    Victim Details

    Mar 10, 2018

    Aug 14, 2018

    David

    OSullivan

    32

    25

    70 inches

    154 lbs

    White / Caucasian

    Male

    Apr 07, 2017

    Idyllwild

    California

    Riverside County

    376

    32413

    Riverside County Sheriff's Department

    Riverside

    California

    Riverside County

    92501

    4095 Lemon Street, California

    9519552400

    County

    Law Enforcement

    http://www.riversidesheriff.org/

    D172130037

    2017-07-24

    Riverside County Sheriff's Department

    10190

    Black

    Blue

    Blue

    12/07/2025


    Area Last Seen:
    Forum Posts (3)
    I've been following David O'Sullivan's case and felt compelled to bring up the weather conditions ar... ...Read More
    11/02/2024
    Hey everyone, I’ve been following David O’Sullivan’s case for a while now, and something that ... ...Read More
    07/10/2024
    Hey everyone,
    I’ve been thinking a lot about the David O'Sullivan case and wanted to share a th... ...Read More
    12/22/2023
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