▁through ▁radi oc ar bon ▁d ating . ▁Also , ▁research ▁notes ▁by ▁Wes ley ▁Bl iss ▁( who ▁had ▁exc av ated ▁in ▁the ▁cave ▁in ▁ 1 9 3 6 ) ▁and ▁others ▁indicate ▁that ▁animal ▁bur row ing ▁led ▁to ▁a ▁mixing ▁of ▁depos its . ▁The ▁notion ▁of ▁a ▁" S and ia ▁Man " ▁occupation ▁of ▁the ▁U . S . ▁South west ▁is ▁no ▁longer ▁accepted ▁by ▁professional ▁arch ae olog ists , ▁but ▁that ▁in ▁itself ▁is ▁not ▁the ▁source ▁of ▁controvers y . ▁Instead , ▁some ▁research ers ▁believe ▁that ▁artifact s ▁were ▁" s alt ed " ▁( fra ud ul ently ▁placed ) ▁in ▁the ▁cave ▁depos its ▁to ▁support ▁the ▁notion ▁of ▁the ▁" S and ia ▁Man " ▁occupation . ▁Those ▁who ▁believe ▁that ▁fra ud ▁was ▁committed ▁often ▁suspect ▁H ib ben ▁of ▁being ▁involved ▁in ▁the ▁fra ud . ▁The ▁evidence ▁is ▁incon clus ive , ▁however , ▁and ▁H ib ben ▁maintained ▁his ▁innoc ence ▁in ▁the ▁matter ▁until ▁his ▁death . ▁ ▁In ▁ 1 9 4 3 , ▁H ib ben ▁described ▁a ▁visit ▁to ▁Ch init na ▁Bay ▁on ▁the ▁west ▁side ▁of ▁Cook ▁In let ▁in ▁Al aska , ▁where ▁he ▁reported ▁finding ▁Y uma - like ▁project ile ▁points ▁like ▁those ▁found ▁at ▁the ▁Clo vis ▁Site ▁in ▁New ▁Mexico ▁and ▁a ▁project ile ▁point ▁similar ▁to ▁those ▁produced ▁by ▁the ▁F ols om ▁culture , ▁who ▁lived ▁on ▁the ▁High ▁Pla ins