“Tower” director Keith Maitland has come on board to direct the post-9/11 spy story “Enemies Within” from his own script, with Killer Content co-financing and co-producing.

Killer has optioned the movie rights from Matt Apuzzo and Adam Goldman to their 2013 book “Enemies Within: Inside the NYPD’s Secret Spying Unit and Bin Laden’s Final Plot Against America.”

“Enemies Within” will explore the competing and somewhat contradictory counter-terrorism efforts around a plot set in New York City after 9/11 in the pursuit of terrorist bomber Najibullah Zazi, who trained under one of Osama bin Laden’s most trusted deputies.

While working for The Associated Press, Apuzzo and Goldman, along with Chris Hawley and Eileen Sullivan won the 2012 Pulitzer Prize for Investigative Reporting for their months-long series outlining the New York police department’s surveillance of minority and particularly Muslim neighborhoods following the 9/11 attacks.

Stuart Rich will executive produce “Enemies Within” along with Adrienne Becker and Rachel Gould for Killer.

“Tower” is an animated documentary that explores the tragic story of America’s first mass school shooting, in which lone gunman Charles Whitman climbed a clock tower at the University of Texas in 1966, shooting 49 people and killing 17. The film, which won the SXSW Grand Jury Prize and Audience Award for best documentary, will be released by Kino Lorber in October.

Killer Content is the parent to Killer Films, which produced “Carol,” “Still Alice,” “I’m Not There” and “Boys don’t Cry.”