Disk-shaped saucer over house w/ a lazer light focused on home

I was driving on St Rd 136 towards the town of Clermont, Indiana when I saw 3 white lights low in the sky. As the airport is 15 mi. so., I didn't think too much of it at first other than the lights were too low for an aircraft on approach as well they didn't seem to be moving towards me, but me towards them. As I drove nearer the lights I stopped & what I saw nearly took my breath away - permanently.  Suspended about 25 ft above a home, was a saucer.  There were 3 "cones" coming from the sides of the saucer: 1 in the middle and 2 others at 45 degree angles from the middle one.  At the tips of these cones were the white lights I'd been watching.  On the underside of the cones were three colors: blue, red, green.  None of the lights were flashing, and there were no "windows".  What terrified me most was that from the underside center of the saucer was the most incredible lazer of white light - about 4 inches wide focused on the roof of the house below.  I rolled down my window and sat to wait for another car to come to confirm for me I wasn't crazy; I even pinched myself hard thinking I might be dreaming.  There was NO sound at all coming from the saucer.   In 1975, Clermont was still a one-stoplight town on the outskirts of Indianapolis.  The saucer was just south of the Dairy Queen by about 3 or 4 houses.  After waiting 10 mins. for another car to come, I got scared and drove to the sheriff's station 2 blocks away but no one was there - at the time it was a 3 man operation.  I was so freaked out I drove around for half an hour before heading home.  The next night I was at a small gathering and hesitantly mentioned seeing a UFO when another friend said, "I saw it too!"  I told him, "Okay - you go in another room and draw a picture of it and then we'll compare."  And by god he had the same picture w/ the cones and all!  He said he saw it around 23:30 flying towards downtown Indianapolis at a high rate of speed accompanied by 2 other saucers.  They flew directly east until they got to Merid! ian St ( divides the city E/W and goes N/S) whereby they took a 90 degree turn and sped down the center of the city!!  Hundreds if not thousands of people must have seen these saucers yet there was no mention of it in any media.  I believe the 12/20/75 sighting on your website is the same as mine - all I can remember is that it was likely a Thur or Fri nite and it was the week leading up to Christms. Of all the reports I've read, none have ever mentioned anything about a lazer focused on a house anything and I've always wondered these last 35 yrs what that white lazer could "see" for them. Oh, and the saucer was of a soft lustre like I've never seen - like and egg painted painted a semi-matte silver.
Witness indicates that the date of the sighting is approximate.  PD