That night, Ethel Rogers dies of a drug overdose in her sleep. The deaths are initially thought to be suicides or accidents until, after the death of General MacArthur, Judge Wargrave determines that they are actually murders and that the host, U.N. Owen, is most likely the killer. Wargrave further speculates that Owen must be one of the remaining 8, and is following the pattern of the nursery rhyme over the fireplace, "Ten Little Sailor Boys".
On the night Ethel Rogers died from a drug overdose in her sleep, initial investigations into the deaths were initially thought to be suicides or accidents. However, after General MacArthur's death, Judge Wargrave concluded that they were murders and suspected U.N. Owen as the killer.  Wargrave theorized that Owen was one of the remaining eight people and was following a pattern from the nursery rhyme "Ten Little Sailor Boys" played over the fireplace.