From "Prison Break: Wash (#2.18)"
[on the rifle he has just sold to Kellerman
] Serial numbers have been cleaned. Chamber's been scraped to throw off ballistics just in case you're not, you know, shooting at tin cans.
[looks up at him
] No, I'm hunting bigger game than that.
[Kellerman then pulls out his silenced pistol
[Kellerman quickly shoots him in the chest, then again when he is down on the ground