Explore for evidence of shorting attack

I don't know how to handle this and it may not be possible with the data that is available for normal stock market history, at least for end of day.
I want to make a submission to a Parliamentary inquiry on a particular subject of manipulation through shorting. The "attack" situation is where there has been a run-up, and news is expected.. The attack is made to set up a buy opportunity if the news is good or walk away if not so good.
With eod all you can see is a strong rise with or without a plateau waiting for the news.
If other posters say, there is no way, you need the intra-day records and shorting info as well, that would at least be a help so i can at least start gathering it for future cases.