Just in case you thought Putin was a pushover.
Check it out:

A gunman murdered Boris Nemtsov, a leader in the Russian opposition and critic of Russian President Vladimir Putin, in the middle of Moscow early Saturday morning.

An anonymous source told TASS that the gunman shot Nemtsov “with four shots from a pistol.” A team is still on site to work the investigation. Putin’s spokesman announced that the president “takes the investigation under his personal control.” Journalists in Moscow went to the scene and posted pictures; a few include Nemtsov’s dead body.