Active
Tracy Marie Kroh
13,596 Days Without Answers
Case File
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ACTIVE
William Frederick Muller
File Nº MP42402
14,462 Days Without Answers
- Age at Disappearance
- 45
- Last Seen
- March 23, 1987
- Location
- Philadelphia, Philadelphia, Pennsylvania
- Investigating Agency
- Bucks County Detectives
- Agency Case #
- 2681-87-04
- Agency Phone
- (215) 340-8143
- Height
- 70 in
- Weight
- 195 lbs
- Hair
- Brown
- Eyes
- Blue
Circumstances
Muller, whose nickname is Billy, was last seen leaving his plumbing job at Smith Kline Beecham at 15th and Spring Garden Streets in Philadelphia, Pennsylvania at 2:30 p.m. on March 23, 1987. His black 1983 Plymouth Turismo has never been recovered. His home was in Nockamixon Township, Bucks County. His case remains unsolved.
Case file last verified October 16, 2026 against the official sources cited above.
More Case Information
Additional details from the official case record, provided for identification.
- Sex
- Male
- Race
- White / Caucasian
Sources: NamUs · The Charley Project
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