as a result , northumbria police voluntarily referred the case to the independent police complaints commission Causation ( ipcc ) .

after the independent police complaints commission ( ipcc ) began Process_start a criminal inquiry Criminal_investigation , further autopsies Scrutiny indicated Coming_to_believe that tomlinson had died Death from internal bleeding Bodily_harm caused Causation by blunt force trauma Bodily_harm to the abdomen , in association with cirrhosis Bodily_harm of the liver .

the independent Change_of_leadership police complaints commission ( ipcc ) has been investigating Criminal_investigation the case but has delayed Change_event_time release Publishing of its report Reporting for more than a year .