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Alleged crime: 2020s,
Alleged crime city:
UT - St. George,
Alleged crime county:
UT - Washington,
Alleged crime state:
Utah,
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Positions: Unknown position, - Mission:
unknown
Alleged:
2 victims, Multiple victims,
Alleged crime scenes:
Online/computer/phone,
Criminal case(s): Admitted guilt, Ongoing,
updated Sep 17, 2026 - request update | add info
Derek Lee Mast (born 1981) is a Mormon church member in St George, Utah. According to a probable cause affidavit dated 14 November 2025, information reached St George Police the previous day that Mast had confessed to sexually molesting two girls.
He had confessed first to his LDS bishop and to his wife, and was on his way to confess to a relative when police were told.
Contacted by phone, he admitted the conduct, then came to the police department, waived his Miranda rights and described three separate incidents of touching one of the girls, who was between 14 and 16 at the time. He also admitted to viewing child sexual abuse material.
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Sources
No sources available. Please contact us to request an update.
Documents
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Criminal case documents
Floodlit does not have information regarding whether a related probable cause affidavit exists. Please check back soon or contact us to request that we look for one.Civil case documents
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