Complex sentence: The female characters find a dead canary that was murdered the in same way as the dead man, thus leading them to the conclusion that the owner of the sewing kit they found the dead canary in (the dead man's wife) was the murderer.
Split into simpler sentences: The female characters find a dead canary that was murdered the same way the male was. Thus leading to the conclusion that the owner of the sewing kit they found the dead canary in, was the murderer.