Butcher of Torfan
"Do I know you?"
"No, but you knew Commander Balak our greatest agent," the batarian grumbled, disgusted at the sight of Shepard before him. "When you killed him in the sky over Terra Nova you threw our external operations into chaos. The reapers annihilated us and most of our people have been transformed into monstrosities. Our few remaining warships have resorted to petty piracy, while I steal scraps for refugees."
Shepard regarded the Batarian for a few moments, before facing the police chief. "I'll take it from here. Spectre authority."
"I…yes commander."
The batarian glared at the human before him. "What you going to do, Shepard?"
"This." Without warning Shepard rammed the omni-blade through the batarian and sliced across. The batarian barely had time to register what was happening before falling over, choking in his own blood while struggling in vain to keep his innards from spilling. But it was all for naught as he quickly succumbed to his wounds. All the while Shepard watched on, as if it was expected of the batarian.
"Why did you do that?" the chief exclaimed, horrified.
"The same reason why I've placed the mandate to turn away every Batarian," the commander calmly replied. "The same reason I didn't even warn anyone in the Bahak system about the mass relay blowing up. The same reason why I went after Balak instead of saving civilians. The same reason why I ordered my men through Torfan. It's all why I am called the Butcher of Torfan." The commander casually leaned down cleaned the blood off using the back of the batarian's shirt.
Rising to full height Shepard turned around and walked away. "They butchered my colony. So I'll butcher all of them."