Best Investigation movies of 2000s

Actors : Collin Chou, Louis Koo, Ray Lui, Donnie Yen,
Directors : Wilson Yip,

A hot-headed inspector takes on a small but powerful Vietnamese-Chinese gang, after a series of crimes and murder attempts committed and putting an undercover cop and his girlfriend in great danger.

Actors : Aubrey Plaza, Donald Glover, D.C. Pierson, Dominic Dierkes,
Directors : Dan Eckman,

A group of former Encyclopedia Brown-style child-detectives struggle to solve an adult mystery.

Actors : John Diehl, Michelle Williams, Wendell Pierce, Shaun Toub,
Directors : Wim Wenders,

A drama that investigates anxiety and disillusionment in America.

Actors : Elijah Wood, Jim Carter, John Hurt, Leonor Watling,
Directors : Álex de la Iglesia,

At Oxford University, a professor and a grad student work together to try to stop a potential series of murders seemingly linked by mathematical symbols.

Actors : Antonio Banderas, Sienna Guillory, Thomas Kretschmann, William Fichtner,
Directors : Tony Krantz,

A private detective is hired to find a missing stripper. A simple job turns complicated when everyone he questions ends up dead.

Actors : Leonor Watling, John Leguizamo, Alfred Molina, Damián Alcázar,
Directors : Sebastián Cordero,

A suspense thriller about a reporter from Miami who travels to Ecuador in pursuit of a serial killer known as the "Monster of Babahoyo."

Actors : Clovis Cornillac, Marie Bunel, Jacques Gamblin, Gérard Depardieu,
Directors : Claude Chabrol,

A well known Parisian inspector becomes involved in an investigation while on holiday.

Actors : Samuel L. Jackson, Carrie-Anne Moss, Stephen Root, Michael Sheen,
Directors : Gregor Jordan,

A psychological thriller centered around a black-ops interrogator and an FBI agent who press a suspect terrorist into divulging the location of three nuclear weapons set to detonate in the U.S.

Actors : Colin Salmon, Lee Evans, Sean McGinley, Ian McNeice,
Directors : John Simpson,

After being accused of a triple-murder, a man films his every moment of his to provide an alibi. Things takes a worst turn when a detective suspects him and the tapes goes missing which can prove his innocence.

Actors : Christian Redl, Nadeshda Brennicke, August Diehl, Johan Leysen,
Directors : Robert Schwentke,

Two police detectives, a grizzled veteran and one fresh-faced rookie, hunt a ritualistic serial killer murdering people with tattoos and skinning them.

Actors : Jeremy Sumpter, Joey Kern, Justin Long, Addie Land,
Directors : Tim Skousen,

Young fantasy and science fiction aficionado Gavin Gore and his friends stumble onto some huge footprints in the woods. A local cop, reporter, and a renowned Sasquatch authority investigate, while two of Gavin's dim-witted neighbors hatch a scheme to profit from the situation.

Actors : Willem Dafoe, Paul Bettany, Marian Aguilera, Trevor Steedman,
Directors : Paul McGuigan,

A priest on the lam takes up with a traveling band of actors, who then discover a murder has occurred and try to solve it by recreating the crime in a play.

Actors : Antonia Zegers, Jaime Vadell, Amparo Noguera, Alfredo Castro,
Directors : Pablo Larraín,

In Chile, 1973, during the last days of Salvador Allende's presidency, an employee at a Morgue's recording office falls for a burlesque dancer who mysteriously disappears.

Actors : Ally Sheedy, Shalom Harlow, Karl Geary, Clarence Williams III,
Directors : Michael Almereyda,

When an unhappy young woman disappears, her worried sister desperately searches the internet for a clue to her missing sibling's whereabouts.

Actors : Danielle Harris, Tiffany Shepis, Max Lesser, Brooke Parker,
Directors : Mark Vadik,

An independent TV reporter and her cameraman interview a man in regards to a serial killer the man knew by the name of Cyrus. The man traces back through the story of the serial killer and why he became the monster he is.

Actors : Patrick Bruel, Isabelle Huppert, François Berléand, Marilyne Canto,
Directors : Claude Chabrol,

A magistrate investigates a corporate executive.

Actors : Lancelot Roch, Olivier Marchal, Diane Kruger, Vincent Lindon,
Directors : Fred Cavayé,

With no legal means left to him, a high school teacher devises a daring plan to rescue his wrongfully imprisoned wife from jail.

Actors : Antonio Banderas, Gregg Henry, Talisa Soto, Lucy Liu,
Directors : Wych Kaosayananda,

Tasked with destroying each other, an FBI agent and a rogue DIA agent soon discover that there's a much bigger enemy at work.

Actors : Taye Diggs, Meredith Monroe, Dominique Swain, Mia Kirshner,
Directors : Zoe Clarke-Williams,

A North Carolina sheriff investigates the near-fatal drug overdose of an underachieving college girl, and uncovers many sordid details of her life before and during her descent into drugs and debauchery.

Actors : Laura Regan, Sean Cw Johnson, Kris Lemche, Stephen O'Reilly,
Directors : Marc Evans,

Five people are offered $1 million to spend six months together in an isolated mansion, with cameras watching their every move.