As Dr. Reed walks toward the house to thin the paint, and is informed he is wanted on the phone, he removes his gloves and tosses them to the ground. In the next cut, viewed from the house, he again removes his gloves, and tosses them on the ground.
In an early scene when Dr. Reed (Richard Widmark) is shown painting with his son, he flicks excess paint off the brush, and then sits on the same spot where the paint would have landed, but when he gets up there's no paint on his pants.
Offering $50 to men desperate for work for any information about a man (Kolchak) would get all of them to volunteer false info just to get the $50. Implausible.