Facts on the Fire - S1.E16

A woman has an unusual request of Ken: she wants him to prove that she's guilty of murdering her husband, although she was cleared of wrongdoing by an inquest. Before he begins investigating in earnest Ken is beaten up by some ""admirers"" of the dead man and ordered to make certain his investigation does prove her guilty. The more Ken digs, the more he uncovers that makes it appear that the woman did murder her husband.