You will need a minimum of ten headshots for this achievement as well as a silenced sniper rifle, and the foil case. In the A New Life mission, select your sniper rifle as your only weapon. Walk around to the tree house at the end of the street where you find the air rifle. It is at the exclamation point near the ladder in the middle of the map. Unpack your rifle and snipe every FBI agent that gets within your sights. Shortly afterwards, two cars will arrive carrying more agents. Snipe these as well, making sure not to hit any civilians or the dog. You should end up with two guards remaining in the surveillance van out front, one at the front door, and one at the back door. Pack your sniper into the foil case and walk back to the surveillance van, but turn into the open garage on the left. Unpack and assemble the rifle in the back corner, dropping the rifle on the floor of the garage. Walk to the other side of the street and poison the donuts when no one is looking. Wait for the caterer to deliver the donuts and watch the intermission sequence. Enter the van when the jogger is out of sight. Change into an FBI suit and use the phone to call the witness. Leave the van immediately and pick up your rifle. Snipe the guard at the front door and look to the left. You should see the witness on the phone in the living room window; snipe him as well. Enter the house through the door to the left of the garage. Walk north to the bedroom with the open window and climb out. Walk to the back corner of the yard and snipe the final FBI agent at the back door. Pack your sniper rifle up and enter the window again. Leave the case in the bedroom and get your sedative syringe ready. Find the wife of the witness running anxiously through the house and sedate her to take the microfilm necklace. Pickup your sniper case on the way out. Change back into your suit you left in the surveillance van, then proceed to the exit to gain the achievement and read an interesting headline.