Kayla Mueller, the U.S. aid worker killed while in ISIS custody, wrote a letter to her family saying: "I DO NOT want the negotiations for my release to be your duty, if there is any other option take it, even if it takes more time." The family shared a second letter exclusively with βTodayβ in which the 26-year-old wrote: βGive your suffering to the Lord, let our creator support you. Continue to pray, by God I feel your love and your prayers.β It is the last letter they received from Kayla while in captivity. Click to read a full transcription of the letter on βToday.β