A/HRC/20/18 culpability for trafficking crimes without heavy or sole reliance on the testimony of victims. Trafficked persons should not be used as instruments for criminal investigations. In all cases, it is imperative that States integrate gender and aged-based perspectives into investigations and prosecution. G. Appropriate penalties 98. Punishment for trafficking in persons must be effective, appropriate and dissuasive. Again, it must be proportionate to the offence committed, and proceeds from the crime should be confiscated. 99. States are urged to disaggregate data on prosecution for trafficking offences by sex, age, year, nationality of convicted persons, form of exploitation, sanctions/penalties and terms of imprisonment, as well as other indicators that would assist in gathering intelligence on understanding the phenomenon of trafficking in persons. H. Preventing unintended negative consequences 100. As States work to adopt a rights-based approach, they should be cognizant of the fact that certain laws and policies may have unintended negative consequences for victims of trafficking. Laws or policies that infringe the right to movement for victims or that impose mandatory detention or rehabilitation in the name of protection are in violation of human rights laws and may deny victims the right to a proper remedy. Care should be taken to enact clear and enforceable legal frameworks that comply with international standards and principles. Such frameworks must take practical constraints into account and be tailored to the State’s legal system in order to provide protection and assistance to trafficked persons during the criminal justice process. 101. The Special Rapporteur notes that political pressure to prosecute traffickers may lead to over-enforcement, shortcuts and unacceptable trade-offs. It is important that efforts by States to end impunity for traffickers should include appropriate safeguards in the criminal justice responses that protect victims, witnesses and suspects, and integrate gender and aged-based perspectives into investigations and prosecution. 102. Lastly, the Special Rapporteur urges States to intensify efforts to strengthen the technical capacity of criminal justice administrators, in particular, that of judges, prosecutors and the police. A comprehensive curriculum on trafficking in persons, including online courses, should be mainstreamed in ongoing education training programmes. 23