"I was hoping that the figures released about serous crime were true."
Why should that not be the case? You've misunderstood the article you linked to. It says that people were not convicted - their crimes were still reported, and have been included in the statistics.
According to the independent Crime Survey for England and Wales recorded crime has fallen by 10% and is at its lowest level since records began.
That's in the article you linked to as well, but perhaps you didn't bother to read that far?