Sue:
Following incidents like this things are very confused and lots of things are happening at once. Sometimes it is not plain who is and who is not a witness and sometimes it is just plain impossible to take formal statements from everyone at once.
You should, if you have not already, make your own notes (i.e. without someone else prompting you) and sign and date them and keep them safe. If the police and/or the IPCC ave your details then you will be on a list of people to contact but, depending on how much detail of how involved you were is there, you may or may not have been prioritsed. In any event they will have thousands of equally important things to do simultaneously and so it may take weeks or months to get round to everything. These are not "normal" events.
"Pre-statements" (ie. notes of a verbal account) are taken where there is no time to take a formal statement or where there is an intention to come back and carry out an interview on video or audio tape (which is far more accurate). Either may, or may not, be the case here.
(StobartSpotter - send your hubby to research "Achieving Best Evidence" and the concept of "Significant Witnesses" in the Major Investigation Manual!)
The IPCC will most likely be the investigators who come and take your statement in due course but it may be police officers acting under their directions (they have very limited in-house resources). Either way, it will get back to them.
Don't worry about forgetting things - psychologists advice is that following traumatic incidents immediate statement taking is NOT the best - sometime after 3-4 days usually and with no significant loss of detailed recall for several weeks.
Good luck. Hope this helps.
