wˈɔːkɚ wʌz wˈʌn ʌvðə "bɹˈɪsbən θɹˈiː": hiː fˈeɪsd tʃˈɑːɹdʒᵻz ʌv kənspˈɪɹəsi ɐɡˈɛnst ðə stˈeɪt ɪn bɹˈɪsbən, ɐlˈɔŋ wɪð lˈaɪənəl fˈɑːɡɑːɹɾi ænd tʃɪlˈiːən nˈæʃənəl dʒˈɑːn ɡɑːɹsˈiːɐ.
Walker was one of the "Brisbane Three": he faced charges of conspiracy against the state in Brisbane, along with Lionel Fogarty and Chilean national John Garcia.