Versions of Utah Code 77-15a-105. Defendant\'s wilful failure to cooperate -- Expert testimony regarding intellectual disability is barred on LawServer 2023 Utah Code 77-15a-105. Defendant’s wilful failure to cooperate — Expert testimony regarding intellectual disability is barred 2022 Utah Code 77-15a-105. Defendant’s wilful failure to cooperate — Expert testimony regarding intellectual disability is barred 2020 Utah Code 77-15a-105. Defendant’s wilful failure to cooperate — Expert testimony regarding intellectual disability is barred 2018 Utah Code 77-15a-105. Defendant’s wilful failure to cooperate — Expert testimony regarding intellectual disability is barred 2016 Utah Code 77-15a-105. Defendant’s wilful failure to cooperate — Expert testimony regarding retardation is barred 2015 Utah Code 77-15a-105. Defendant’s wilful failure to cooperate — Expert testimony regarding retardation is barred 2014 Utah Code 77-15a-105. Defendant’s wilful failure to cooperate — Expert testimony regarding retardation is barred 2013 Utah Code 77-15a-105. Defendant’s wilful failure to cooperate — Expert testimony regarding retardation is barred 2010 Utah Code 77-15a-105. Defendant’s wilful failure to cooperate — Expert testimony regarding retardation is barred