Lieutenant Josephs is the Enterprise security officer who discovers the murdered Tellarite ambassador Gav stuffed into a Jefferies tube and reports the killing to Kirk in Journey to Babel.
Lieutenant Josephs serves in security aboard the USS Enterprise during the voyage to the Babel conference, shown in the Original Series episode Journey to Babel. The ship is carrying more than a hundred delegates who are deeply divided over the admission of Coridan to the Federation.
It is Josephs who finds the body of the Tellarite ambassador Gav hidden in a Jefferies tube and calls the bridge to tell Kirk there has been a murder. His discovery turns a tense diplomatic mission into a criminal investigation.
McCoy establishes that Gav's neck was broken by an expert, using a Vulcan technique, and suspicion falls on Ambassador Sarek, who had quarrelled with Gav shortly before. The real killer proves to be the disguised Orion agent Thelev.