and the footage shows steinle falling to the ground as juan francisco lopez sanchez tosses the gun in the water and takes off. one officer responded to the scene telling the jury lopez sanchez looks like a deer in headlights when caught by police. lopez sanchez, the whole thing an accident. he has been deported five times and was jailed just before the shooting. today marks a major milestone for signature trump campaign promises. >> build that wall. build that wall. build a wall. we are going to build the wall. >> officials will start reviewing finished border wall prototypes erected near the san diego border. the eight pieces will face a test how difficult they are to climb, dig under or cut through but donald trump telling lou dobbs it is not just people the wall will stop. >> part of the reason we need the wall, you need a wall, the