The phrase "an unknown culprit" is correct and usable in written English.
It can be used when referring to a person who is responsible for a crime or wrongdoing but whose identity is not known.
Example: "The police are investigating the case but have yet to identify an unknown culprit behind the recent thefts in the neighborhood."
Alternatives: "an unidentified perpetrator" or "a mysterious offender."
But before the game, an unknown culprit had left their mark on the away dressing room by – and there's little point being coy about this – voiding their bowels on the floor.
Well, our call for better patron behavior has been soundly ignored in California, in chilling fashion, too, by an unknown culprit who ignited a bottle of flammable liquid and tossed it into the after-hours book drop of Sacramento's Arden-Dimick branch at around 3 30 A.M. Monday.
An unknown culprit did add a 45th portrait to the gallery, though.
If that is true, it may be that the antiviral drugs given to those with HIV are bringing relief by attacking this unknown culprit too.If this second idea is the right one, it means a treatment for MS looks eminently plausible; it may simply be a question of repurposing some existing drugs.
Therefore, the unknown culprit DNA quantity was 67 pg (i.e., 6.7% of 1,000 pg).
The unknown culprit(s) accessed seeds in all exclusion treatments without disturbing cage placement, and is likely to be an arthropod capable of jumping and/or flying.
When the victim genotype is considered as a known reference in the mixture interpretation, the resulting Q genotype is based on inferring just one genotype, that of the unknown culprit.
The TrueAllele computer had determined that the unknown culprit comprised 6.7% of the mixed specimen; the FBI laboratory measured the starting DNA quantity as 1 ng (in a standard 25 µL volume).
One of the great hurdles the government had to clear at the start of its war on the Mafia, Reppetto says, was that the approach required to bring down a criminal organization ran "counter to general principles of American criminal justice": "The usual practice, investigating a known crime in order to apprehend unknown culprits, was reversed.
The police are still searching for the unknown culprits, who broke into about 50 buses and spray-painted graffiti, set off fire extinguishers and smashed first-aid equipment.
His family believes the boy was kidnapped and killed by Jewish extremists "in revenge" for the recent kidnapping and killing of three Israeli settler youth in the West Bank by unknown culprits.
