Sami's assailant was wearing a black mask.

Mary couldn't identify her assailant.

It was clear, however, that Straker had defended himself vigorously against his assailants, for in his right hand he held a small knife, which was clotted with blood up to the handle, while in his left he clasped a red and black silk cravat.

Tom struggled with his assailant and managed to escape.

Tom fought off his assailant.

She couldn't identify her assailant.

The assailant ran when he saw the police.

He shot his assailant but didn't kill him.

Witnesses provided detailed descriptions of the assailant.

Sami couldn't run away from his assailants.