Finally caught up!
Just a thought in regards to the arrest of EC, would it be possible that she in fact had contacted the police herself? Perhaps the accused has been acting strangely, saying things, commenting on the case etc, and coupled with something like ‘can you say I was at home if anyone asks, can you wash these muddy clothes’ or similar, this has raised alarm bells to her? I assume if she had done any of these things she would still have to be arrested and questioned for assisting an offender? JMO and speculation.
I think in this case she'd have been treated as a witness until they had evidence she was involved in some way . No need to arrest her while she is assisting- But I could be wrong.