He led them up to Mr Sinik's roof and showed them in person, demonstrating on a friend, how he had garrotted his victims.

他把他们带到辛尼克先生的屋顶，和一个朋友一块展示，他是如何绞死他的受害者的。

The end of that may garrotte much of the tail.

尾巴的末端可能会绞死大部分尾巴。