Father of slain Tsarnaev associate pens letter to Obama, alleges FBI deliberately killed son​The father of Ibragim Todashev, former friend of alleged Boston Marathon bomber Tamerlan Tsarnaev, has released an open letter to President Barack Obama calling for justice after his son’s murder. Todashev was killed by FBI agents in May. Abdulbaki Todashev’s letter includes photos of his son’s bullet-ridden body and his bloodstained Orlando, Florida apartment.