I think it is prudent to examine the case thoroughly. People will have questions, and being able to give as full an account as possible will help people to understand what happened and how. Certainly, no public official would want to hear for years afterward that there was a cover-up or a shoddy investigation.
I'm not convinced that the police think the coroner is wrong simply because they are looking for a complete picture.
I didn't say the police think the coroner is wrong. They're leaving the case open and not jumping to conclusions without a full investigation. As I said in my first post, anything is possible. But suicide doesn't seem likely for a 10 year old. By "suicide" I mean "intent to kill oneself." As I said in my first post, it could've been an accident, for example in a type of "choking game". But, it's rare for a 10yo to purposely commit suicide.
In case you're unfamiliar with "choking game", here is a website with more information: http://www.chokinggame.net/GeneralInfo.html But, I wouldn't rush to that conclusion, either. It's also possible the mother will never know what happened.