1. Anna's killer must have smoked the cigarette after the murder. 2. Anna might have dropped her phone down seeing a suspicious person who came to her. 3. photo could showed Anna and her husband, who found out that Anna was cheating on him, and came to take revenge. 4.Most likely, Anna might have wanted to fly away with her lover, but her plans were interrupted by her husband, who unexpectedly came to her and killed her. 5. Money could have been spent on this tickets to Bali. 6. Anna might have drank the vine, before her husband came. 7. I think, Anna's husband might have been a killer.