iM 100 % SURE THAT THERE WAS A SEQUEL...MY SOURSE SAYS THAt Dana Andrews turned out bad,,,a crooked cop for Laura...but I ain't seen it!
Sorry, I was lising remakes, but I notice that you said sequel.
Still, I don't think there was one.
If from what you said, you mean that both Dana Andrews and Gene Tierney were in this sequel, it would have to have been one of these, the only two movies they both appeared in that were made after LAURA:
THE IRON CURTAIN (1948)
WHERE THE SIDEWALK ENDS (1950)
While the latter has a few very minor connections to LAURA, neither can be considered a sequel to LAURA.