Question: The actor that voiced Ernest Hemingway in "Cooper & Hemingway: The True Gen" currently plays what role on "Blue Bloods"?

Context paragraphs:
Marty Belafsky: Marty Belafsky (born September 19, 1975) is an American actor/comedian born in Los Angeles, California.  He began acting professionally at age 13 and was soon cast as Louis Plumb on the short-lived NBC series "Hull High".  Shortly thereafter, Belafsky landed the role of Crutchy in the Disney musical film, "Newsies".  He continued acting through his teens, making appearances in such television shows as "The Wonder Years", "Great Scott" and "Step By Step" and the film "Wrestling Ernest Hemingway".  Belafsky also voiced Kent Swanson in the video game series "Dead Rising" released in 2006.

Richard Zampella: Richard Zampella is an American film and multimedia producer, who has collaborated with John Mulholland (director) on three documentaries films including; Sergeant York of God & Country (Warner Home Video—Narrated by Liam Neeson), Inside High Noon (Lions Gate Entertainment—Narrated by Frank Langella) and Cooper & Hemingway: The True Gen (Narrated by Sam Waterston).  Cooper & Hemingway: The True Gen was reviewed by The New York Times film critic Andy Webster on October 11, 2013 and was named an NY Times Critics’ Pic by Manohla Dargis, A. O. Scott and Stephen Holden.  Webster said the picture was proof that the work of these two men "endures and so does what they stood for".

True at First Light: True at First Light is a book by American novelist Ernest Hemingway about his 1953–54 East African safari with his fourth wife Mary, released posthumously in his centennial year in 1999.  The book received mostly negative or lukewarm reviews from the popular press and sparked a literary controversy regarding how, and whether, an author's work should be reworked and published after his death.  Unlike critics in the popular press, Hemingway scholars generally consider "True at First Light" to be complex and a worthy addition to his canon of later fiction.

Witches of East End: Witches of East End is a 2011 novel by author Melissa de la Cruz and the first entry in her "Beauchamp Family" series.  It was published on June 21, 2011, by Hyperion Books and follows a family of Long Island witches struggling against dark forces conspiring against them.  "Witches of East End" is de la Cruz's first adult novel; she said she wrote it with her Blue Bloods audience in mind because "many of them will soon be adults" and the book takes place in the same universe as the "Blue Bloods" series.  The novel currently has two sequels: "Serpent's Kiss" (2012) and "Winds of Salem" (2013).

Len Cariou: Leonard Joseph "Len" Cariou (born September 30, 1939) is a Canadian actor, best known for his portrayal of Sweeney Todd in the original cast of "", which earned him a Tony award.  He currently plays the patriarch, Henry Reagan, NYPD Police Commissioner (retired), in the multi-generational television series "Blue Bloods" on CBS.

Running from Crazy: Running from Crazy is a 2013 television documentary film by director Barbara Kopple about the family of Mariel Hemingway, grand daughter of Nobel Prize-winning author Ernest Hemingway.  Through the eyes of Mariel, who received an Oscar nomination for her role in Woody Allen's 1979 film "Manhattan", and who has spoken for the American Foundation for Suicide Prevention, it chronicles the story of three of the author's grandchildren; Mariel, Margaux Hemingway and Joan "Muffet" Hemingway, daughters of Jack Hemingway, and their struggles with the family history of substance abuse, mental illness and suicide.  First shown at the 2013 Sundance Film Festival, the documentary was promoted on the Oprah Winfrey Network, which aired its premiere on April 27, 2014.

Green Hills of Africa: Green Hills of Africa is a 1935 work of nonfiction by American writer Ernest Hemingway.  Hemingway's second work of nonfiction, "Green Hills of Africa" is an account of a month on safari he and his wife, Pauline Marie Pfeiffer, took in East Africa during December 1933.  "Green Hills of Africa" is divided into four parts: "Pursuit and Conversation", "Pursuit Remembered", "Pursuit and Failure", and "Pursuit as Happiness", each of which plays a different role in the story.

Cooper &amp; Hemingway: The True Gen: Cooper & Hemingway: The True Gen is a 2013 documentary film about the 20-year friendship between writer Ernest Hemingway and film actor Gary Cooper.  Written and directed by John Mulholland, it is narrated by actor Sam Waterston with actor Len Cariou as the voice of writer Ernest Hemingway.

For Whom the Bell Tolls (film): For Whom the Bell Tolls is a 1943 American war film produced and directed by Sam Wood and starring Gary Cooper, Ingrid Bergman, Akim Tamiroff, and Joseph Calleia.  The screenwriter Dudley Nichols based his script on the 1940 novel "For Whom the Bell Tolls" by American novelist Ernest Hemingway.  The film is about an American International Brigades volunteer, Robert Jordan (Cooper), who is fighting in the Spanish Civil War against the fascists.  During his desperate mission to blow up a strategically important bridge to protect Republican forces, Jordan falls in love with a young woman guerrilla fighter (Bergman).

Patrick Hemingway: Patrick Hemingway (born June 28, 1928) is Ernest Hemingway's second son, and the first born to Hemingway's second wife Pauline Pfeiffer.  During his childhood he travelled frequently with his parents, and then attended Harvard University, graduated in 1950, and shortly thereafter moved to East Africa where he lived for 25 years.  In Tanzania, Patrick was a professional big-game hunter and for over a decade he owned a safari business.  In the 1960s he was appointed by the United Nations to the Wildlife Management College in Tanzania as a teacher of conservation and wildlife.  In the 1970s he moved to Montana where he manages the intellectual property of his father's estate.  He edited his father's unpublished novel about a 1950s safari to Africa and published it with the title "True at First Light" (1999).

Supporting paragraphs: Cooper &amp; Hemingway: The True Gen Len Cariou
Answer: Henry Reagan