When i completed my security mobile check of site i parked the vehicle looked across to the sports field and saw a very bright light beam across from grounds dept to the corner of a building. The beam was at chest height. I got back into the vehicle and drove back to the area, Nothing, Noone around, i used my night scanner and the field is enormous and noone could of hidden from me. I am ex Police and am trained to observe. I reported a UFO yesterday, Expecting to see it again following x 2 sightings on x 2 different nights i was ready for the sighting but nothing last night. What was also strange re my x 2 sightings was i tried to photograph the object but couldnt pick up on my mobile or camera. What is happening is very strange as i have worked Security on this site for almost x 9 years and these events are the first time i have seen on this site which is very large. I am going to join MUFON in the future as there is Something out there i cannot explain. Regards, Brian.