Not that ive read. Theyve obviously checked sporadically in the park.So they hadn't already searched Croda!? SMH....
If you think about it suppose PR drove Libby to the oak road car park and things escalated resulting in Libbys death. PR cant risk putting her in his car and get contaminated by all that dna evidence , he would need to dispose of her body there and then in the nearest and best place , i woudnt use the river , croda is near and its private and not going to have the risk of dog walkers discovering her. He could even move her a few weeks later when things quieten down.
They should just send in dogs tho (altho who am i to tell the police what they should and shoudnt do)