The new episode of Down the Hill goes into an incredible amount of detail on the search of Richard Allen's property on October 13th. I'd recommend a listen, it's episode 11: Arrest:
Chapter 11: Arrest - Down The Hill: The Delphi Murders
I know some of this has been posted in the thread already but things are moving so fast I'll recap for people who are catching up:
The producers of Down the Hill (which is affiliated with HLN) talked with several neighbors of RA to develop their timeline and account of the search.
The search started just before noon on Thursday, October 13th. Neighbors saw unmarked police cars arriving and people that they recognized from their personal knowledge as police officers going up to the RA home and became suspicious and watched for the next 12 hours.
RA and his wife were asked to leave the home and were kept out of their home the entire day. RA stood outside for several hours and sat in a vehicle with his wife for several hours and at some point during that day, she left.
Neighbors said that for the first several hours, there wasn't a lot going on, it was just LE standing around. But as it started to get dark they saw Chief Deputy Liggett of the CACO Sheriff arrive, and he's somebody that the neighbors know on sight. Liggett had a piece of paper in his hand and he went up to RA and showed him the paper, and immediately after that a tow truck arrived and loaded RA's car.
Officers who had been accumulating at the house all day then went into the house and backyard. They took pictures inside a shed and took pictures. They used a device around the shed and in flower beds. Neighbors speculated that it could have been a metal detectors. LE dug in two spots near the shed.
Neighbors watched police bring out two large bundles of dark cloth. There was a Macy's shopping bag, a shoebox, and a stack of books that were thin books. The two areas in the backyard that were dug up were small.
Neighbors were curious about what was happening and since one family had children, they reached out to Tony Liggett and expressed their concerns. All that Deputy Liggett would tell them was to stay vigilant, especially with the neighbor's wife and daughters, which the neighbor found unsettling. However, it was not until the 28th when they saw the news updates about the case that they had any idea that this could be related. This neighbor also knows some members of the victims' families and were able to talk to them and make the connection that the family had been alerted to information that seemed to match their observance of the search at RA's house.
Wednesday the 26th was the first day that the neighbors did not see anyone at RA's house. From the time of the search until the 26th they observed RA at his place of employment and in his home, apparently living his life as normal.