I stepped into my from yard at approximately 9:15 in the evening to let my dogs out for a few minutes. i heard a helicopter coming from a north westerly trajectory. i looked up to see it. it was flying low- maybe 500 ft. i don't know for certain but i could make out the shape. it had its spotlight on and pointing down. it was then i noticed the star like white ball of light in a straight line in front of helicopter. it was matching speed and was heading south with helicopter following it. i stepped out farther into my yard and watched them both as the rapidly disappeared. i walked back inside my house and just thought- that did not look normal.