What I find hilarious is that it it doesn't appear to have occured to you that plod will have looked very hard at the husband - they'll have gone through all their financials, emails, phones, not least to establish exactly where he was at the time. Phones and ANPR cameras are great for that...
When they make a statement they pick their words carefully. Just because they don't tell you why they pick a particular phrase, it doesn't mean they threw magnetic letters at the fridge and just went with whatever turned up.