his father
... that Tyler Shanabarger's death was believed to be caused by sudden infant death syndrome until his father confessed to the murder?
... that Tyler Shanabarger's death was believed to be caused by <a class="mw-redirect" href="./Sudden_infant_death_syndrome" id="mwEm0" rel="mw:WikiLink" title="Sudden infant death syndrome">sudden infant death syndrome</a> until <b id="mwEm4"><a class="new" data-mw-i18n='{"title":{"lang":"x-page","key":"red-link-title","params":["Ronald Shanabarger"]}}' href="./Ronald_Shanabarger?action=edit&amp;redlink=1" id="mwEm8" rel="mw:WikiLink" title="Ronald Shanabarger" typeof="mw:LocalizedAttrs">his father</a></b> confessed to the murder?