Broncos' Brandon Marshall shares racist, threatening letter he received

Linebacker shared handwritten two-page letter on InstagramWriter used multiple racial epithets and threatening languageBroncos’ security staff is investigating the anonymous letterThe Denver Broncos’ security staff is investigating a hate-filled latter that was sent anonymously to linebacker Brandon Marshall at the team’s headquarters.The handwritten two-page letter, which Marshall posted to Instagram on Friday morning, addresses the fifth-year veteran as a “worthless fuc