I was court martialled and sentenced to six months in a military prison.

我受到了军事法庭的审判，被判在军事监狱服刑6个月。

《柯林斯英汉双解大词典》

I always said he would wind up in prison.

我以前一直说他终归要进班房。

《牛津词典》

The revenge was that I knew he was in prison and that I knew he would be hanged.

报复是我知道他在监狱里，知道他会被绞死。

youdao

"As a mother my heart went out to all of them. I cannot imagine what it would feel like to know that your child was in prison, for now 100 days, with very little contact between you and them.

VOA: standard.2009.11.05

Therefore, even though I was in prison, I felt that I was respected by prisoners and staff alike.

CNN: The freed man

My chest was concave when I was a child, but if you look closely, this is true of most children, and the weight lifting I did in prison helped with that, and while I don't actually have a barrel chest, I might have a half barrel.

NPR: Chapter 1

He and I were in prison together in Edgefield, SC from August 2001 until my release in September 2002.

FORBES: Mark Whitacre (aka The Informant) Delivers Keynote Address at ACFE Conference