As Scar is being healed by Winry 's parents , he panics after seeing his brother 's arm and kills Winry 's parents .
Before dying , Scar 's brother transmutates his arm to Scar after gaining alchemical abilities .
As Scar is being healed by Winry 's parents , brother panics after seeing his brother 's arm and kills Winry 's parents .
Before dying , Scar 's brother transmutates his arm to Scar after gaining alchemical abilities .