In the state of Indiana what would give an Officer proximate cause to perform a field sobriety test or a breathalyzer test on an individual that did not appear to be under the influence nor did he smell of alcohol?

-He was driving southbound on Main Street at 5 p.m. when an Indiana State Trooper pulled him over for not having his headlights on. It was early evening, but it was not dark. As a result of that traffic stop, the officer gave the individual a field sobriety test and, ultimately, a breathalyzer.

- The Officer his not smell alcohol and the individual did not appear to be under the influence.