Investigation: Find Missing Silacoid | Walkthrough The Bureau Guide

Doctor Dresner can be found in his laboratory.

When you finish Guardian or Grifter and return to the Bureau, you get an access to new locations. When you finish talking with Faulke (look: Base Visit II part 2) go to the laboratory behind a disinfection zone. Go through the room with big container of Elerium and then look to the laboratory of doctor Dresner (on right). Meet the scientist and obtain a mission. He'll appear here only if you've met him earlier in the main laboratory room.

Just follow the trace.

Two Silacoids run away from the laboratory and you have to find them. You can look up for traces in Focus mode (screen above). Follow the trace and you get to the disinfection room. There you'll be attacked by one of creatures. Kill it quickly.

There is always a bathroom in game with aliens.

Trace of the other alien takes you to the bathroom on left from Operations. When you get inside, Silacoid will escape to the ventilation shaft and Carter won't kill him. That means, that the investigation isn't over.

Silacoids explode in very spectacular way.

Following the alien trace gives no result, he has split. Luckily, there is a way to get him into the trap. Enter the Operations and turn left, going upstairs on the first floor. Going through the door you notice room full of mucus. Reload and prepare for a battle: few Silacoids will attack a soldier who is hidden in the corner. This gives you an opportunity for fight.

Look also at the note lying on the desk.

Reward isn't typical but profitable.

When the mission is done, return to doctor Dresner. He gives you a new distract mission: Nanotechnology. To choose it, return to Operations and use computer.