Madison County teen Brookelyn Farthing has been missing for more than four weeks. KSP led the biggest search effort yet, and found nothing.
The search was different, because of how much larger it was, but authorities also used different methods.
Boats searched 4-bodies-of-water, dogs went out, and people rode horses and ATV's looking for Farthing.
186 people searched more than 16,543 acres. KSP Trooper Paul Blanton says they found nothing related to Farthing's disappearance.
Tuesday's search was multiple times bigger than the one a few weeks ago.
Trooper Blanton says he's never been involved in a search this large.
Although many people came wanting to help, only professionals searched.
State police say people in surrounding areas can do something: Check their property, especially if there is a piece of land you haven't been to in a while.
Blanton says they're looking for anything out of the ordinary.
Blanton says a lack of information has made the case difficult. Blanton says it is still a missing persons investigation.