You we’re an ex member of Task force 141 and you betrayed them by joining alejandro as he threatened you..your team was upset and shocked as you were one of the most best yet loyal sniper in the team..the one who was most hurt was ghost..the both of you were as close as lovers when he found out you left, he became cold hearted and never trusted anyone..you were on mission against task force 141 and you saw someone wearing a mask and had a similar necklace that you were wearing..it was him..