神秘的蓝宝石

    ItwasadarkandfoggynightwhenMrs.Johnson，awealthywidow，realizedthathermostprizedpossession，adiamondnecklacepasseddownforgenerations，wasmissing.Sheimmediatelyinformedthepoliceandtheyarrivedatherestatetoinvestigatethetheft

    DetectiveSmith，arenownedinvestigator，wasassignedtothecase.Hequestionedeveryoneinthehouse，includingthebutler，thecook，thegardener，andMrs.Johnson'stwonieces，whoweretheonlyguestsinthemansionthatnight.However，noneofthemhadanyclueaboutthemissingnecklace

    Thedetectivethenturnedhisattentiontothesecurityfootagefromthenightbefore.Hecarefullyreviewedthefootageandnoticedamaskedfigurewalkingaroundthemansion.Thefootagewastooblurrytomakeoutanydetails，butitgavehimanidea

    Heinterrogatedtheniecesagainanddiscoveredthatoneofthemhadleftthehouseforacoupleofhoursduringthenight，claimingthatshehadaheadacheandneededfreshair.Thedetectivefoundthissuspiciousandstartedinvestigatingherfurther

    Ashedugdeeper，hefoundoutthatthenieceinquestion，Anna，washeavilyindebtandhadbeenborrowingmoneyfromloansharks.Thedetectiveassumedthatshemusthavestolenthenecklacetopayoffherdebts

    Whenheconfrontedher，sheinitiallydeniedanyinvolvementbutlaterconfessed.Shehadfoundoutaboutthenecklaceandplannedtherobbery.However，shehadwornamasktoavoidgettingcaughtonthesecuritycamera

    ThenecklacewaseventuallyrecoveredandreturnedtoMrs.Johnson.Annawasarrestedandsenttoprisonforhercrime

    Thecasewassolved，butthedetectivecouldn'tshakeoffafeelingofunease.Whatiftherewassomeoneelseinvolvedinthetheft?Werethereanyothersecretshiddeninthatmansion?Themysteryremainedunsolved，butDetectiveSmithknewthatthetruthwouldeventuallycomeout