LE has been so closed on this case-IMHO, like everyone here, feels that AG deserves justice but it's so hard with such little evidence to go on. IMO, the murder contained an "anger" component.
Anger could be
1) jealousy (friendship, possessiveness, love interest, possessions, lifestyle)
2) financial(owing someone, someone owing, perhaps a financial comment, wanting something of financial interest ie. land etc)
3) hatred (sexual orientation, racist/bigoted opinions, religion)
When I consider the description of the murder by Hrab with the "sexual component" and trophy statement, IMO, it sounds like something was cut off, leading me to figure out how hatred would fit in with AG. What would cause this hatred? Religious beliefs that AG was evil? Jealousy from someone who thought AG was spending too much time with someone else? Jealous that someone admired AG and acted on a possessive streak? A condescending manner towards someone-insinuating they weren't bright, or were lazy or not good enough to be a friend or perhaps good enough for a friend to have as a partner or friend? Or just a sick random person who hated women? (IMO, AG's dogs would not have been locked in a room if it was the latter.)
Also, IMO, AG didn't have time to scream or alert the dogs but rather ambushed and instantly silenced with a stab or blow to the head while chatting in the garage leaning up against her car while she was getting a smoke or something? Then once on the ground, the hatred and anger (JA style) really set in, resulting in the overkill. JMHO