Well, statistically, men are 9-10x more likely to commit murder than women. So statistically it's much more unlikely to be a women murderer. When you take into account the victims were men (or were they; did the journalist accurately describe them, who knows) it's even less likely because most women couldn't overpower two men. But yes, of course, not impossible.
The main point is that we can't believe journalists any more. And if they'll lie about Scarlet Blake's sex - despite being a murderer and despite the huge disrespect and disregard this shows towards the victim and his family - then they'll lie about anything. Literally anything. Maybe it wasn't two men who were killed. Who knows, anything is possible really.