''Gunshots and screaming.''
''Attacker's red eyes, as his face was blocked by a rogue's bandana.''
So it wasn't a silent attack, since she screamed and there were gunshots, since we don't know what kind of woman was her mother we don't exactly know if she would shoot at the aggressor.
''Her front door was smashed open''
This means that the aggressor had great strength.
''A sudden blow to her head made her collapse next to her slain mother.''
a) There were 2 people in the murder, she saw the eyes of one but then the other one hit her in the back of her head.
b) Only 1 guy, that was really fast that surprised her and hit her in her head, she still saw his eyes.
Could it be gangplank and his father?
Or a random guy?