There’s a great podcast about this case on Audible. Called “I Am Not Nicholas”.
Features interviews with many connected to the case but also family members of his wife/people from her past.
https://www.audible.co.uk/pd/I-Am-Not-Nicholas-Podcast/B0BTZ7YLX9?qid=1682263232&sr=1-1&ref=a_search_c3_lProduct_1_1&pf_rd_p=c6e316b8-14da-418d-8f91-b3cad83c5183&pf_rd_r=DV17E653D48PGXFHTJNV&pageLoadId=9Z1k95ZTgxvN6Dbc&creativeId=41e85e98-10b8-40e2-907d-6b663f04a42d |