Why If conidition is not set to true?

I am running the following code. However, the if condition is never not set to true wrongly. Any idea please?

    private static int MinFirst(Coordinate First, Coordinate[] Coords) {

    int foundFirst = 0;
    double dFirst = 0;
    double firstMinDist = Coords[0].distance(First);

    for (int i = 1; i < Coords.length; i++) {
        dFirst = Coords[i].distance(First);

        if (dFirst < firstMinDist) {
            foundFirst = i;
            firstMinDist = dFirst;
        }
    }
    return foundFirst;
}