She was never a ninja. Look closely at the way she is flipping around while fighting the reporter. Himiko fights and leaps around like a cat. She has cat irises and she has cat fangs. Himiko is cat-themed. It is likely that her ability to move is just something inherent in her DNA. Wouldn't be surprised if one of her parents had an even more pronounced cat-physic. I mean. look at Asui's parents.>>188302900
That made no sense at all though. It literally show us that Horikoshi is a bad writer. I could accept her avoiding getting caught for maybe 1 year tops, but if she dropped out of school when she was around 12 years old, and kept on killing people for all those years, then her case would have become a top priority. Even if they didn't have somebody with a quirk convenient enough that would allow them to track her down, simply following the blood trail and setting up a trap for her would have been a simple thing.
The police of the whole country+how many thousands of active heroes? And you are telling me that they could not find such serial killer even after years of searching for her?
No, either Horikoshi is a really bad writer, or something about what that reported said was wrong.