Footage shows cop creep into home of pregnant woman Sandra Birchmore wearing chilling outfit on night she was slain [Video]

Chilling video has emerged showing a masked ex-police officer who is accused of murdering his pregnant mistress entering and leaving her apartment just hours before she was killed.

Massachusetts woman Sandra Birchmore, 23, was found dead inside her Canton apartment in February 2021. 

Prosecutors say her accused killer Matthew Farwell, a former Stoughton detective, staged the scene to make it look like a suicide.

They claim the married ex-cop was attempting to conceal his sexual relationship with Birchmore, which allegedly began when she was 15 and he was 27, from his pregnant wife. 

The haunting video shows Farwell entering Birchmore’s apartment building while wearing dark hooded clothing and a covid-19 face mask – before hastily exiting around 30 minutes later. 

He was then allegedly pictured wearing the same clothes in a snap of him cradling his newborn son taken the next day, investigative podcast The Case reports.