The most recent national report submitted to the Committee against Torture by Costa Rica was its second periodic report. This report, which was due in 2002, was submitted in 2006. It was considered during the 40th session of CAT in May 2008.
Costa Rica second periodic report: UN Doc.CAT/C/CRI/2, 14 June 2006. Available (English and Spanish) here.
CAT issued its concluding observations in respect of the report on 7 July 2008: Concluding observations of the Committee against Torture: Costa Rica, UN Doc. CAT/C/CRI/CO/2, 7 July 2008. The document can be viewed on the UNHCR Refworld website.
A Spanish language version is available here.