19 cards where the text includes “suspect” and the set is “mkm”

Absolving Lammasu (Murders at Karlov Manor #2)
Agency Coroner (Murders at Karlov Manor #75)
Agrus Kos, Spirit of Justice (Murders at Karlov Manor #184)
Airtight Alibi (Murders at Karlov Manor #149)
Barbed Servitor (Murders at Karlov Manor #77)
Case of the Stashed Skeleton (Murders at Karlov Manor #80)
Caught Red-Handed (Murders at Karlov Manor #115)
Clandestine Meddler (Murders at Karlov Manor #82)
Convenient Target (Murders at Karlov Manor #119)
Deadly Complication (Murders at Karlov Manor #195)
Eliminate the Impossible (Murders at Karlov Manor #54)
Frantic Scapegoat (Murders at Karlov Manor #126)
It Doesn't Add Up (Murders at Karlov Manor #89)
Person of Interest (Murders at Karlov Manor #139)
Presumed Dead (Murders at Karlov Manor #100)
Reasonable Doubt (Murders at Karlov Manor #69)
Repeat Offender (Murders at Karlov Manor #101)
Rubblebelt Braggart (Murders at Karlov Manor #143)
Rune-Brand Juggler (Murders at Karlov Manor #229)

The message was clear to Sorin—time to search for something else.