Searching for the true killer of Count Drebber, Sherlock and John set a trap for the culprit using a wedding ring found at the murder scene as bait. After a struggle in which the ring is lost, Sherlock is able to deduce who the real killer is.
According to Brother's analysis,
he is likely to have a strong interest
على حسب تحليلي أخي، لا بدّ أنّ لديه اهتماما قويا
Deiner Analyse nach hätte er
großes Interesse daran haben sollen,
Según el análisis de mi hermano,
D’après l’analyse de William,
il est très curieux de savoir
De acordo com a
análise do meu irmão,
Согласно твоему анализу,
 его очень сильно интриговало,