"Inmates [on suicide watch] are often placed naked in suicide cells, which are usually bare concrete, often without bedding (to prevent hanging by using bedsheets)..."

"... and under frequent or continuous observation by guards. Unsanitary conditions are also common since toilet paper, underwear and tampons (all potential means of choking) are restricted. Being exposed without any way of covering oneself, coupled with being under constant observation, can aggravate mental distress, particularly if the inmate has been a victim of sexual abuse. These harsh conditions came to light in 1998 when Elizabeth B., an inmate of Framingham prison in Massachusetts, USA, called a radio talk show to describe how she had been treated while on suicide watch: 'I was ... put on eyeball status, stripped of belongings, clothing, placed naked in a room with nothing but a plastic mattress on the floor. Watched 24 hours a day by a man or woman. I was on my period but because of my status not allowed to have tampons or underwear. I was very humiliated, degraded. Being on eyeball status with male officers, my depression intensified. I didn't want to be violated any more than I already was, so I put the mattress up against the window. When I did that I was in violation because they couldn't see me. The door was forced open, I was physically restrained in four-point restraints - arms, legs spreadeagled, tied to the floor, naked, helmet on head, men and women in the room.'"

From the Wikipedia article "Suicide watch," which I'm reading this morning because I saw on Twitter that some people had been aggressively editing the page inserting references to Jeffrey Epstein. If you look at the revision history for the page, you'll see that a huge number of back-and-forth edits were made yesterday until the "protection level" of the page was raised.

I copied the text you see above because it may help understand why Jeffrey Epstein was not kept on suicide watch, even though he had (apparently) attempted suicide last month. The treatment is so severe that to continue it might be cruel and unusual punishment. It could be used to deliberately torment a prisoner.