I won't insult your intelligence

为了不侮辱你的智商
by explaining it to you.

我就不解释了
No, please, insult away.

别啊说来听听
'You forgot to put your collar up.'

忘记把领子竖起来了
The corpse is, is six months old.

死者遇害有半年
It's dressed in a shoddy Victorian outfit from a museum.

身上的衣服是从博物馆弄来的维多利亚时代仿冒品
It's been displayed on a dummy for many years,

衣服穿在人偶上展示了很多年
in a case facing south-east,

展示柜朝向东南面
judging from the fading of the fabric.

从布料的褪色情况可以看出来
It was sold off in a fire damage sale a week ago.

博物馆遭遇火灾后一周前物品清卖时衣服被出售
So the whole thing was a fake?

这都是伪造出来的吗
Yes.

没错