We had a guy in Basic like your brother. He was well over 6 foot, very pale and just barley met the BMI requirements the Army uses to disqualify overweight recruits. His name was Eisenburg but we all called him Iceberg because he was a big, white, slow moving mass. He kinda looked like a real life version of the character Chris on Family Guy but super tall. After 10 weeks we were calling him Drago because he was looking a lot like Dolph Lundgren from Rocky IV.My brother went through basic training at Ft. Bliss. When he left home he was a tall, somewhat chubby pale young man. When we went to his graduation we had trouble picking him out of the crowd of brown soldiers. He was a lot thinner and had a dark tan that he had never had when we were kids playing outside in the New Mexico sun. I assumed they had them outside 16 hours a day.
My neice was also stationed at Ft. Bliss. Her unit had orders to go to the middle east but she died before that happened. There was a huge investigation and the family (including me) think her husband poisoned her. Anyway, sorry, that went dark fast.
I'm sorry to hear about your niece. Nobody deserves to go through that.