(31) The Committee is concerned at the fact that substantiated information indicates that executions in the State party can be accompanied by severe pain and suffering (arts. 16, 1 and 2). The State party should carefully review its execution methods, in particular lethal injection, in order to prevent severe pain and suffering. (32) The Committee is concerned at reliable reports of sexual assault of sentenced detainees, as well as persons in pretrial or immigration detention, in places of detention in the State party. The Committee is concerned that there are numerous reports of sexual violence perpetrated by detainees on one another, and that persons of differing sexual orientation are particularly vulnerable. The Committee is also concerned by the lack of prompt and independent investigation of such acts and that appropriate measures to combat these abuses have not been implemented by the State party (arts. 16, 12, 13 and 14). The State party should design and implement appropriate measures to prevent all sexual violence in all its detention centres. The State party should ensure that all allegations of violence in detention centres are investigated promptly and independently, perpetrators are prosecuted and appropriately sentenced and victims can seek redress, including appropriate compensation. (33) The Committee is concerned at the treatment of detained women in the State party, including gender-based humiliation and incidents of shackling of women detainees during childbirth (art. 16). The State party should adopt all appropriate measures to ensure that women in detention are treated in conformity with international standards. (34) The Committee reiterates the concern expressed in its previous recommendations about the conditions of the detention of children, in particular the fact that they may not be completely segregated from adults during pretrial detention and after sentencing. The Committee is also concerned at the large number of children sentenced to life imprisonment in the State party (art. 16). The State party should ensure that detained children are kept in facilities separate from those for adults in conformity with international standards. The State party should address the question of sentences of life imprisonment of children, as these could constitute cruel, inhuman or degrading treatment or punishment. (35) The Committee remains concerned about the extensive use by the State party’s law-enforcement personnel of electroshock devices, which have caused several deaths. The Committee is concerned that this practice raises serious issues of compatibility with article 16 of the Convention. The State party should carefully review the use of electroshock devices, strictly regulate their use, restricting it to substitution for lethal weapons, and eliminate the use of these devices to restrain persons in custody, as this leads to breaches of article 16 of the Convention. (36) The Committee remains concerned about the extremely harsh regime imposed on detainees in “supermaximum prisons”. The Committee is concerned about the prolonged isolation periods detainees are subjected to, the effect such treatment has on their mental health, and that its purpose may be retribution, in which case it would constitute cruel, inhuman or degrading treatment or punishment (art. 16). The State party should review the regime imposed on detainees in “supermaximum prisons”, in particular the practice of prolonged isolation. 73