***They have records of her texting after she got back home.**
The dogs she was watching may hold a clue. Could they have known the ‘intruder’ and didn’t react - or did they try to protect her?
Good point. The old “Silver Blaze” observation:
Holmes: “I wish to call your attention to curious incident of the dog during the night.”
Inspector: “The dog did nothing during the night.”
Holmes: “That is the curious incident.”