Police Quest: SWAT 2

Use the knife to jam the spikes in the floor, then use the knife to jam the panel in the right wall. Squirt oil into the cracks in the ceiling, crush the top of Specter and remove from stand. On the right side of bench, squirt oil inside the hole, Climb to the top of the hollow tree trunk and go up in the lift. At the Foyer, show the Shard of Memory to the Curator and then search to reveal a hidden door.