They Do It With Mirrors (Miss Marple)

Amanisshotatinajuvenilereformhome–butsomeoneelsedies…MissMarplesensesdangerwhenshevisitsafriendlivinginaVictorianmansionwhichdoublesasarehabilitiationcentrefordelinquents.Herfearsareconfirmedwhenayouthfiresarevolverattheadministrator,LewisSerrocold.Neitherisinjured.Butamysteriousvisitor,MrGilbrandsen,islessfortunate–shotdeadsimultaneouslyinanotherpartofthebuilding.Purecoincidence?MissMarplethinksnot,andvowstodiscovertherealreasonforMrGilbrandsen’svisit.