Xulhaz Mannan, Mahbub Rabbi Tonoy hacked to death on April 25, 2016
U.S. must pressure country's government to act
Pro-Putin president has been in power for decade
Canadian government describes situation as 'reprehensible'
Secretary of state met with Vladimir Putin on Wednesday
Rex Tillerson arrived in Moscow on Tuesday
State Department declines to comment on report
Rex Tillerson to travel to Moscow on April 12
Secretary of State Rex Tillerson urged to respond
Our vital shared ground is under brutal assault
