All three incidents occurred in the dead of night.

3起事件都发生在深夜。

《柯林斯英汉双解大词典》

I crept out of bed in the dead of night and sneaked downstairs.

深夜我悄悄地从床上爬起来，蹑手蹑脚地下了楼。

《牛津词典》

Many a puzzled neighbour saw their privet hedges trimmed in the dead of night so I could get fodder for my caterpillars.

很多不知就里的邻居会发现他们的女贞树篱在夜深人静时被人剪了，那是因为我要给我的毛虫找吃的。

youdao

And now at the dead hour of the night, in the horrible silence of that old house, so strange a noise as this excited me to uncontrollable terror.

VOA: special.2009.05.16

Nick Ramos, walking the streets in the dead of night alongside the Iraqi police.

CNN: Iraqi forces now calling the shots

The Israeli army still regularly escorts Jewish pilgrims here in the dead of night.

BBC: Part II: The road to Bethlehem

In the dead of night, the Transportation Security Administration (TSA) administratively reclassified airport security screeners as Transportation Security Officers.

FORBES: The TSA Is Coming To A Highway Near You