That is prison dependant, deaths are not uncommon.
Some wings have security cameras, allot of them do not, some although they are there do not function. Generally there will be more than one guard on the wing at all times, with the exception of night time. Although, this isn’t a time to act up, as several of them will come running if you cause a disturbance.
Panic buttons, large green buttons they look like exit buttons you’d typically see in a hospital secure ward. Pushing one will alert the guards to the location by causing a loud audible alert