coroner

sounds like COLONEL -a public officer.

Now invistagator has to find out whether death is because of coronary disease or something unnatural

We read in the papers that Michael Jackson's death was being investigated by a coroner as it was suspected to be of unnatural cause.

The car toyota corona has died and is no longer in production by that name, so we need a coroner to dicscover what lead to the death of toyota corona

replace the second "o" with pse to make it corpse scientist or coffin scientist