Two Witnesses Sight Flying Prism Shaped Object That Hovered for 45 Minutes Before Moving Slowly Sideways

Date of Sighting: April 13, 2006
Time of Sighting: 10:30 PM CDT
Date Reported: April 13, 2006
Duration of Sighting: 45 Minutes
Location of Sighting: Round Rock, Texas (About 17 Miles North-Northeast of downtown Austin, Texas)
Latitude:  30.5 Degrees North
Longitude:  97.67 Degrees West
Number of Witnesses: Two
Number of Witnesses Interview: One
Weather: Clear Skies.  Visibility 10 Miles.

Description (In Witness's Own Words):  About 30 degrees up from horizon, my friend and I stepped out back and saw something shimmering above the tree line. It looked like a prism....it shimmered red, blue and white colors. A couple times it just turned a bright white for a few seconds then went to a prism. We observed it for about 45 minutes and it slowly moved about 15 degrees sideways. Would be interesting to hear from anyone else that might have seen it as well.

Investigator's Notes: The witness has reported a strange sighting given that it was of odd shape and hovered for considerable time before moving.  I have written to the witness requesting more details.  Given current information I have no explanation for this sighting.