[Veen]

The answer to Murray's questions is in the article.

Prosecutors dropped the rape investigation in 2017 because they were unable to formally notify him of allegations while he was staying in the embassy.

They are considering re-opening the investigation.

[yasp]

So was a warrant issued or not? In the US, at least, being "unable to formally notify [someone] of allegations" would not prevent a warrant from being issued.

[Veen]

A warrant was issued, but while he was in the embassy the Swedish government couldn't serve him with a notification of it.

Top prosecutor Marianne Ny said his arrest warrant was being revoked as it was impossible to serve him notice.

https://www.bbc.co.uk/news/world-europe-39973864

You are unlikely to come to sound conclusions if you reason on the basis of your knowledge of US law. Sweden is not the US.

[akvadrako]

This is not the US, so US legal customs are irrelevant.

[evilmoo]

This isn't in the US.

There are many differences between the US and EU/UK.