Re the “attempts to charge her” that’s not really how it’s probably worked if I’m honest.
She would have been arrested for X offences but to get medical records released, the police would have needed the parents permission, they can also take some time, then they’d of needed to find impartial people to look over such evidence etc. she has a right to give an account for EVERY charge against her, hence them arresting her a further 2 times as she has to be questioned under caution. They also can’t keep her in a cell for months on ends whilst medical evidence is collected & reviewed so obviously they had to bail/release her under investigation. That’s how investigations work??
CPS are the deciding party to authorise a charge, depending the processes of the force, this could have been done electronically for them to view the amount of evidence as well which again, would have take a lot of time. They may have identified areas where the police needed to obtain further statements from people or get further medical records from different times. It’s not that they “made evidence to fit” this is a HUGE investigation & when I worked in my old role, CPS could take up to 6 months to decide a charging decision on a S39 assault with all possible evidence available (victim statement, independent witness statement, CCTV injury photos, no comment interview, prev DV history)…it’s not fast but that doesn’t mean the evidence isn’t there. The burden of proof is very high & realistically, would you have wanted her to be in court after a slap dash quick investigation? I wouldn’t.