ed ▁a ▁serious ▁threat . ▁ ▁In ▁March ▁ 2 0 0 8 , ▁Alan ▁is ▁re int rodu ced ▁into ▁the ▁show ▁and ▁is ▁later ▁found ▁st ab bed ▁to ▁death . ▁This ▁story ▁crossed ▁over ▁into ▁the ▁show ' s ▁sister ▁series ▁Hol by Blue . ▁The ▁episode ▁focus es ▁on ▁the ▁murder ▁investigation ▁and ▁police ▁inter views ▁conducted ▁with ▁Hol by ▁City ▁characters . ▁Jac ▁is ▁arrested ▁on ▁susp icion ▁of ▁murder , ▁having ▁earlier ▁threatened ▁to ▁kill ▁Alan ▁in - front ▁of ▁her ▁colle agues . ▁Marcel ▁told ▁an ▁Inside ▁So ap ▁rep orter ▁that ▁Jac ▁" find s ▁it ▁hard " ▁because ▁the ▁evidence ▁suggests ▁she ▁killed ▁him , ▁adding ▁that ▁" she ▁has ▁no ▁cred ible ▁al ib i ▁and ▁her ▁finger print s ▁are ▁on ▁the ▁murder ▁weapon ." ▁ ▁Jac ▁ple ads ▁her ▁innoc ence ▁when ▁she ▁is ▁presented ▁with ▁the ▁evidence . ▁The ▁actress ▁sympath ised ▁with ▁Jac ▁because ▁" she ▁fully ▁bel ieves ▁in ▁her ▁ab ilities ▁as ▁a ▁sur geon ▁and ▁wouldn ' t ▁je op ard ise ▁that ." ▁When ▁the ▁police ▁interview ▁Joseph , ▁he ▁does ▁not ▁defend ▁Jac ▁and ▁claims ▁that ▁she ▁is ▁capable ▁of ▁murder . ▁Marcel ▁said ▁that ▁Jac ▁should ▁be ▁shock ed ▁by ▁Joseph ' s ▁statement ▁but ▁" she ▁has ▁a ▁history ▁with ▁him , ▁so ▁he ▁probably ▁bel ieves ▁that ▁she ' s ▁capable ▁of ▁anything ." ▁Marcel ▁told ▁a ▁BBC ▁Online ▁rep orter ▁that ▁fans ▁would ▁" lo ve ▁the ▁story line "