On December 26th of 2003, less than a fortnight after his capture, Saddam Hussein gave the following letter to his jailers. In it, he complained of beatings, sleep deprivation due to the sounds associated with others being tortured, and generally poor conditions.
He was executed 3 years later.
(Source: Daily News; Image: Saddam Hussein at trial in 2004, via Wikipedia.)
In the name of God the Compassionate and Most Merciful
From Saddam Hussein / The President of the Republic of Iraq to whom it may concern.
I have been in this place since 12/13/2003, when I was captured until this day 12/26/2003, in addition to the harm and beatings that I have received following my capture on 12/13/2003, after which not a single part of my body was spared of the severe harm that was inflicted by the detention gang, and where some of the traces are still visible on my body until now, what I wanted to inform the concerned authorities now is that my opportunity to sleep in this place is limited and almost scarce, even though I am laying down on my bed the majority of the time, so in order in order for you to know the truth as it is, for example the last three days my total hours of sleep did not exceed four to five hours during all these days, because the place I am in, is similar in its condition to all detention places, it seems, that it was transformed into a place for torturing the detainees at night in general, and also during the day most of the time, in addition to the disturbing sound effects of those who are been interrogated or tortured, and I don't think that there is anyone with a sensitive and humanitarian heart, who can sleep amidst the screams of the torturers and the ones being tortured, and the many blows of the doors and the squeaking sounds of the chairs.
Look into this matter and other matters if this is of interest to you, if not God will look and see from his heaven, and look upon anyone who stands in front of him in judgement.
God is great...God is great.