"Obviously he (Mohammed) is in a traumatic state by losing the entire members of his family - his mother, his father, his brother, sister-in-law and his beloved sister he's lost as well, " said Mr Shazada.
"Brad was a wonderful father to two young children, a beloved husband to a wife who is expecting another child, a loving son, and the most loyal and supportive brother I could have ever asked for, " Bill Hasler said in a statement.