The son of the Norfolk police and crime commissioner (PCC) is to be charged with causing death by dangerous driving.
Henry Bett, 26, from Hall Lane, Thornham, Norfolk, is the son of prominent farmer Stephen Bett, the former Tory chairman of Norfolk Police Authority who now serves as the independent PCC for the county.
He has been summonsed to appear in court charged with the offence following an independent investigation by Essex Police.
The inquiry was launched after Rebecca Brown, 43, of De-Warrenne Place, Castle Acre, died following the collision between her Fiat and a tractor in the village on December 4 last year.
This decision followed advice from the Thames and Chiltern Crown Prosecution Service.
The inquiry was carried out externally due to Mr Bett's role.
Henry Bett will appear at King's Lynn Magistrates Court on December 10 when he will formally face the allegation.
Jamie Athill (C) 30,834 (31.74%)
Stephen Bett (Ind) 27,842 (28.66%)
Steve Morphew (Lab) 21,456 (22.08%)
Matthew Smith (Ukip) 9,633 (9.91%)
James Joyce (LD) 7,392 (7.61%)
Eliminated: James Joyce, Steve Morphew, Matthew Smith
Distribution of Joyce's, Morphew's and Smith's votes
Jamie Athill (C) 36,605
Stephen Bett (Ind) 39,988
Elected: Stephen Bett**
Electorate 669,387; Turnout 97,157 (14.51%)