Setelah kematian Kim, kepolisian Malaysia menahan seorang wanita di [[Bandar Udara Internasional Kuala Lumpur]] terkait serangan tersebut pada 14 Februari 2017. Wanita tersebut, yang berusia 28 tahun dan bernama Đoàn Thị Hương, memegang dokumentasi perjalanan Vietnam.<ref name="BBC_15Feb_1">{{cite news |title= Kim Jong-nam death: Malaysia police hold female suspect |url=http://www.bbc.co.uk/news/world-asia-38980474|accessdate=15 February 2017|publisher=BBC | work = News|date=15 February 2017}}</ref> Đoàn diidentifikasikan melalui rekaman [[CCTV]].<ref name="Holmes.15Feb">{{cite news|last =Holmes |first =Oliver|title=Kim Jong-nam death: Malaysian police arrest female suspect|url=https://www.theguardian.com/world/2017/feb/15/kim-jong-nam-malaysian-police-arrest-female-suspect-over-death|accessdate= 15 February 2017|work=The Guardian |date=15 February 2017}}</ref>
