Humphrey takes Martha to the hotel La Maison Cecile but on their first night Charlie Taylor, brother of owner Elliot, is murdered. Death in Paradise, Series 6, Episode 3 - BBC One
(the barman) claimed Charlie had helped him find work to atone for a past indiscretion, but he remains a person of interest. Delitti in Paradiso 6x3
Humphrey's investigation uncovers several potential motives among the hotel staff and family: Humphrey takes Martha to the hotel La Maison