ДЕТЕКТИВ- an expert onthe criminal investigation,detective,detective.His responsibilities include thecollection of evidenceand giving theirjurisdictions.
Private investigator- a person performinga detective(detective) activityanddetective servicesproviderin private (individual) way.
МЭР- head of administration, chief executiveof the village, mostof the city,in some countries -and a smallregion, such asLithuania,mayorheadsand districtgovernments.
Job titlecomes from theLatin word«maior»,meaning "big","great".In Russia,the titlestuckinthe 1990s,morelike a shortreplacingthe phrase "mayor", "the head ofthe city administration," or "head of thecity executivecommittee."In this case,the position of"mayor"was introducedat the official level