Definition
An obsolete Latin legal term from old English law denoting a murderer. The word appears in medieval legal instruments and treatises written in Law Latin, the formal language of English courts and legal records prior to the gradual shift toward vernacular legal writing. It is the agent noun derived from the verb *murdrare* (to murder), and its plural form *murdritores* (murderers) appears in the same contexts.
The term has no operative meaning in modern law and functions solely as a term of historical and archival significance. Researchers encounter it exclusively in medieval English legal manuscripts, plea rolls, and Latin treatises.
Common Confusion
*Murdritor* (the killer) is easily confused with *murdrum* (the legal institution or fine associated with secret homicide). The two terms share a root and appear in close proximity in medieval sources, but they refer to different things: one is the agent (the person who kills), the other is the legal response to undetected secret killing imposed on the surrounding community. Researchers should not read *murdritor* as a reference to the *murdrum* fine or the presentment procedure.
Why It Matters in Research
The primary research value of *murdritor* is recognition: a researcher working through medieval plea rolls, assize records, or Bracton's *De Legibus et Consuetudinibus Angliae* needs to identify the term on sight and understand what it denotes without interrupting the research workflow.
Several navigational points matter here:
First, *murdritor* and its plural *murdritores* appear in Bracton's treatise, one of the foundational texts of English common law. Bracton's *De Legibus* is a core source in the Law Mind corpus for understanding 13th-century English criminal law doctrine. Any researcher tracing the historical development of homicide categories — murder, manslaughter, justifiable killing — will pass through Bracton and will encounter this term.
Second, the underlying concept of *murdrum* (the fine or presentment associated with secret killing) and *murdritor* (the killer) are related but distinct. The word *murdritor* refers to the person; *murdrum* refers to the legal institution surrounding secret homicide and the communal fine. Conflating the two is a common archival error.
Third, because medieval legal Latin often appears in contracted or abbreviated form in manuscript sources, variant spellings and abbreviations of *murdritor* exist. Researchers using digitized manuscript databases should search flexibly.
Fourth, the term's absence from modern legal dictionaries — including most standard historical ones — means researchers who encounter it without preparation may not find it through ordinary reference channels. Its appearance in Burrill's is one of the few accessible anchor points in print reference literature.
Historical Dictionary Support
Burrill's Law Dictionary provides the essential reference: *murdritor* is glossed as "a murderer" in old English law, derived from *murdrare*, with the plural *murdritores* cited directly to Bracton at folio 115b. This is a lean but sufficient entry, and Burrill correctly situates the term as Latin-language legal vocabulary rather than a term of art with independent doctrinal weight.
What historical dictionaries including Burrill's do not provide is any discussion of the broader legal institution of *murdrum* within which *murdritor* operated — the communal presentment obligation, the *murdrum* fine levied on the hundred when a killer was not produced, and the eventual abolition of *murdrum* presentments by statute. For that context, Bracton himself and secondary scholarship on medieval English criminal procedure are necessary. The dictionary entry is a starting point, not a complete picture.
No meaningful divergence exists among historical sources on the basic meaning of the term; the scholarly consensus is stable and narrow.