At least the police said Helen was arrested on suspicion of wounding rather than attempted murder
attempt murder is extremely difficult to prove as it is a crime of specific intent. wounding much easier to prove.
what will happen now is that they will take helen to custody where the custody sgt will have the abdabs about having a 33wk pregnant female in on a stabbing, she may well be taken to hospital on constant watch (ie with 2 officers)
she will get her legal rights and offered duty lawyer - she wont be able to use usha as a) she does not do criminal work and (b) it would be a conflict because she knows helen (c) on such a serious charge she needs someone that knows what they are doing.
she will be interviewed. she can be held for up to 72 hours then charged or bailed back while they investigate.
the reason they wont talk to her at scene is because she is a suspect under caution and to talj to her about the offence would be an interview which is governed by PACE. so as soon as you arrest they have to stop talking. any significant comments are noted verbatim in the pocketbook and signed by the prisoner