TITLE: UN-Backed Police Massacred Haitians With Impunity
SENTENCE 1: The November 13 raid was one of the first major acts involving the new mission, and the response will define the future of the U.N.’s relationship with the people of Grand Ravine — and the success of the newly empowered local police force.
SENTENCE 2: The post-operation unilateral initiative of some HNP members to conduct a high risk search, proceeding outside of the operational cadre, without advising the hierarchy, without authorization and contravening the operation plan was not part of the planned operation.”  When I arrived at the Maranatha Evangelical College campus, traveling with a broadcast team from Al Jazeera four days after the raid, it was immediately obvious something heinous had transpired.
SENTENCE 3: UN-Backed Police Massacred Haitians With Impunity  “When the police finally left the campus, around 11 a.m., nine civilians lay dead in the courtyard — five of whom had been shot in the head.”  At 5 o'clock on the morning of November 13, more than 200 Haitian police officers raided the Grand Ravine area of Port-au-Prince.

Bias label: moderately
Annotator rationales:
If you use term like "heinous", then you evokes sensationalism, drawing people attention and provoking outrage.
if the local police acted with the support of UN then UN should share the responsability of the attack
If you use extreme terms like "massacred with impunity", then you evoke sensationalism, drawing people attention and provoking strong reactions.
If you use graphic detailes "lay dead-had been shot in the head",  then you try  to evoke anger and polarize the reader's stance on the event.