There is a suggestion that the investigation of the case was farmed out to a "neutral" province to depoliticize the process.
There is word that this done deliberately, to depoliticize the exhibits.
1928, from de- + politicize. Related: Depoliticized; depoliticizing.
1758, "take up politics," from politics + -ize. Meaning "to render political" is from 1846. Related: Politicized; politicizing. Earlier was politize (late 16c.), but this was rare.