The Blue Raptor is found in the one way museum tour, two rooms through the tour. When you find him, run into the next room. Position yourself so that the Blue Raptor is under the shadow. When he is in position, shoot the switch and a Modeled Pteranadon will fall on him. After he gets up, run into the next room and immediately get behind the exhibit in the middle. Start pushing it quickly. It will fall on him. Repeat either the falling Pteranadon or the exhibit case actions one more time to defeat him.