They would also like to speak to anyone who was driving between Holybourne and Binsted on the same day between the same times, to come forward with any dash cam footage they have.
If people have come forward previously, officers do not need to hear from them.
Richard, 52, went missing from Bentley on May 6, after leaving to go running at 10.30am. He was then seen by a member of the public at around 10.50am running on Isington Road.
Chief Inspector Alex Reading said: “We are again appealing for any new information that may help us locate Richard.
“Richard is described as being white, around 6ft tall, with greying hair and a beard. He also has a distinctive birth mark on his face.
“He was last seen wearing a blue long sleeved top with a half zip, black shorts, and blue trainers.
“We are very grateful for the support and information we have already received from the public in this investigation so far, please get in touch if you have anything that could assist us further.
“We are continuing to keep Richard’s family updated and support them at this difficult time.”
If you can help please phone 101 and quote the reference 44200160398.