38 cards where the text includes “investigate” and the set is “mkm”

Alquist Proft, Master Sleuth (Murders at Karlov Manor #185)
Auspicious Arrival (Murders at Karlov Manor #5)
Case of the Filched Falcon (Murders at Karlov Manor #44)
Chalk Outline (Murders at Karlov Manor #157)
Cold Case Cracker (Murders at Karlov Manor #46)
Curious Inquiry (Murders at Karlov Manor #51)
Deduce (Murders at Karlov Manor #52)
Detective's Satchel (Murders at Karlov Manor #196)
Drag the Canal (Murders at Karlov Manor #199)
Eliminate the Impossible (Murders at Karlov Manor #54)
Evidence Examiner (Murders at Karlov Manor #201)
Ezrim, Agency Chief (Murders at Karlov Manor #202)
Flotsam // Jetsam (Murders at Karlov Manor #247)
Forensic Gadgeteer (Murders at Karlov Manor #57)
Gleaming Geardrake (Murders at Karlov Manor #205)
Homicide Investigator (Murders at Karlov Manor #86)
Hotshot Investigators (Murders at Karlov Manor #60)
Innocent Bystander (Murders at Karlov Manor #133)
Kellan, Inquisitive Prodigy // Tail the Suspect (Murders at Karlov Manor #212)
Lazav, Wearer of Faces (Murders at Karlov Manor #216)
Loxodon Eavesdropper (Murders at Karlov Manor #168)
Magnifying Glass (Murders at Karlov Manor #255)
Meddling Youths (Murders at Karlov Manor #219)
Mistway Spy (Murders at Karlov Manor #65)
Novice Inspector (Murders at Karlov Manor #29)
No Witnesses (Murders at Karlov Manor #27)
Officious Interrogation (Murders at Karlov Manor #222)
On the Job (Murders at Karlov Manor #30)
Out Cold (Murders at Karlov Manor #66)
Persuasive Interrogators (Murders at Karlov Manor #98)
Sharp-Eyed Rookie (Murders at Karlov Manor #176)
Teysa, Opulent Oligarch (Murders at Karlov Manor #234)
The Chase Is On (Murders at Karlov Manor #116)
They Went This Way (Murders at Karlov Manor #178)
Torch the Witness (Murders at Karlov Manor #146)
Toxin Analysis (Murders at Karlov Manor #107)
Undercover Crocodelf (Murders at Karlov Manor #239)
Wojek Investigator (Murders at Karlov Manor #36)

In the blink of an eye, they strode from deep snow to the end of this search.