The caution allowed the field to be bunched up one final time. Jeff Gordon, who was leading at the time of the caution, came out second behind Menard's teammate, Kevin Harvick, following a round of pit stops.
Harvick went on to win the race.
Helton and NASCAR spokesman Kerry Tharp confirmed no driver or crew chief complained about the caution to NASCAR officials after the race.
Gordon was the first to raise the idea the caution may have been intentional, during his postrace comments Saturday night and again on Thursday.
Harvick and Kyle Busch sit atop the Chase standings entering Sunday's 10-race playoff opener at Chicagoland Speedway.