Ah, found what I've been looking for.
Re. Richard Allen's Oct 13th 2022 interview -
This is from Lawyer Lee's notes from watching the interview video in court,
timestamp 12.11
"
So when he sort of described how he came to go to the police and it started out with 'they asked anyone who was there in the park that day when the girls were missing, when they were abducted, if you were there come in and talk'. He said 'I told my wife and she said "well they want to talk to everybody"' so he went to the Sheriff's station and voluntarily put his name and information down. So a couple of days later Officer Dulan calls him and at the time, RA is in his car..."
What he doesn't mention of course is the photo and appeal they had released:
15th Feb 2017
ISP: "We're going to track them down"
Indiana State Police released the photo below on Wednesday. They say this man was on the Delphi Historic Trail around the time that Abby and Libby were there.
They want to speak to him about what he may have seen.
15 February 2017 ·
DO YOU RECOGNIZE THIS MAN?
Indiana State Police say he was walking on the Delphi Historic Trail around the same time as Abigail Williams and Liberty German were there on Monday.
If you can identify the person in this photo or were parked in the lot contact the Carroll County Sheriff's Department at (765) 564-2345 or Indiana State Police at (765) 567-2125.