William Farwell, the twin brother of accused killer Matthew Farwell, voluntary agreed to a revocation of his law enforcement certification.

Stoughton residents rallied for justice in the Sandra Birchmore case, with ex-officer Matthew Farwell charged with her murder.

Allegations included in the decertification agreement indicate he had a sexual relationship with the woman his brother is accused of killing.

The prosecution arm of the Peace Officers Standards and Training Commission, or POST, initiated proceedings last year to strip William T. Farwell of his authority to work as a police officer in Massachusetts and to add his name to a national list of decertified officers.

Stoughton cop William Farwell allegedly admitted to investigators he had a sexual relationship with Birchmore before his brother allegedly killed her.

The Massachusetts POST Commission has decertified William Farwell, a former Stoughton Police officer and brother of Matthew Farwell, who the feds have charged with killing Sandra Birchmore.

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The POST Commission announced that they have revoked the certification of former Stoughton Police Officer William Farwell.