I have previously posted the search activities per the Carroll County fire scanner and I emphasize there isn't much traffic but it does give you a timeline of certain activities.
This link opens to a folder. The audio files containing search radio traffic are there. There is a text file that lists which file, what time in the file, and a transcript of the message.
The one thing I will point out is that the last activity is likely at a point shortly after the girls were found which occurred at 12:11pm.
https://drive.google.com/open?id=0Bx0LL2gY_AordzJTTTAtT0FLbnM
I am still finishing up with Indiana State Police scanner traffic and I will be posting those audio files and a text file just like I have for the Fire Scanner likely for tomorrow. The same is true as with the fire scanner there isn't much radio traffic. However, it too provides indications of the types of searches going on and where and when. The key things so far:
There was a helicopter based searched that was conducted between 9am and 12:00pm on the 14th. There was one State Police helicopter involved. There is mention of a Life Flight helicopter (at 9am) but it is unclear if that helicopter was involved with the search or passing through the airspace. The helicopter search was only conducted East of the bridge along the creek and the land surrounding it on both sides of the creek to a distance of 4 miles. The helicopter search did not sight the girls.
While there has been mention of dogs involved in the search it appears that they did not arrive prior to the girls being found. The last transmission concerning an ETA for the dogs occurred about the time the girls were found.
In conjunction with that, the dogs were to be directed to a location where tracks had been found. There is no indication in the radio transmissions that these would be the same tracks that led to the girls. There was radio traffic to ISP personnel to keep people away from the tracks until the dogs arrived.
There is no scanner traffic confirming that the girls were found and a citizen did report to an ISP officer that the girls had been found already but the ISP dispatch center had no confirmation of that - that was about 25 minutes after the girls were found. Keep in mind that the dispatch center would not be necessarily privy to, or in contact with the search command which should also be noted was not being run by ISP. And I would also add that when situations like this (finding bodies) occur it is often the case where they don't broadcast that over the air and that leads to situations such as this where not all units involved know that the find has been made.
Like I said, I should be able to get those files uploaded and write up the text file like I did for the fire scanner for tomorrow. The only thing I will say about the ISP scanner archive (out of Tippicanoe County) is that it is a stereo broadcast with one speaker ISP and the other speaker Lafayette, West Lafayette, and Purdue police departments. So there can be and is many times where there are transmissions at the same time. It will be easier to listen to if I isolate the times and which speaker you should be listening to rather than trying to pick it out of everything else going on.