You seem to have a very loose understanding of how the Swedish society works. The Police is not "run by the Government" - it's role in the Swedish society is directed by Polislagen (The Police Law). The Government directs (as it does with all governmental departments) Rikspolisstyrelsen (The National Police Board) via broad (and public) assignments and budgets.

The Government (or the Police) have of course no right to manipulate the data - in Sweden more or less all data is publicly available, and manipulation of crime statistics would be something very noteworthy (and likely to cause a big scandal).

And finally, if you google it, you'll know that crime rates have been decreasing in the last few years (few years meaning 2-3, and looking at all categories of crimes). Over a 10 year period, some categories of crimes have risen (at least the number of reported crimes have risen), and others, like homicide have markedly declined.