"In 2014, there were 1,053 deaths in local jails, an 8% increase from 2013. Respiratory deaths increased 32%, from 31 deaths in 2013 to 41 in 2014. Suicides, the leading cause of death, increased 13% between 2013 and 2014, from 328 to 372. Heart disease, the second leading cause of death in local jails, decreased from 260 deaths in 2013 to 239 in 2014. […] Between 2000 and 2014, jail authorities reported a total of 14,786 inmate deaths in local jails. Suicides accounted for 31% of jail inmate deaths during that period. Jail inmates served a median of 19 days prior to death between 2000 and 2014. During the same period, a third (35%) of inmates were being held for a violent offense prior to death and about a quarter (24%) were being held for a public order offense. About half (49%) of inmates who died in a jail died in a medical facility between 2000 and 2014. Data in this report were developed from the Bureau of Justice Statistics' (BJS) Deaths in Custody Reporting Program (DCRP), an annual data collection of inmate deaths in local jails and state prisons. The DCRP is the only national statistical collection that obtains comprehensive data about deaths in adult correctional facilities. BJS initiated the DCRP data collection for local jails in 2000."
Bureau of Justice Statistics: https://www.bjs.gov