Charles Joel Nordstrom Kinnaman (born 25 November 1979) is a Swedish American actor, best known in Sweden for playing the lead role in the Swedish film Easy Money, a role that earned him a Guldbagge Award in the "Best Actor" category, and also for his roles as Frank Wagner in the Johan Falk film series and Governor Will Conway in the U.S. version of House of Cards. He starred as detective Stephen Holder on AMC's The Killing, and played Alex Murphy in the 2014 RoboCop remake, and Rick Flag in the film adaptation of Suicide Squad (2016), based on the DC Comics anti-hero team of the same name.

Who is the actor that plays holder in the killing? OK. Let's think. My stream of consciousness:
The relevant information to answer the above question is: He starred as detective Stephen Holder on AMC's The Killing, and played Alex Murphy in the 2014 RoboCop remake, and Rick Flag in the film adaptation of Suicide Squad (2016), based on the DC Comics anti-hero team of the same name. The answer is Charles Joel Nordstrom Kinnaman.