A US federal judge has refused prosecutors’ request to prohibit the maker of the 1990s rap classic Bling Bling “from promoting and glorifying future gun violence/murder” in songs and at concerts while on supervised release from prison, saying such a restriction could violate his constitutional right to free speech.

But the artist known as BG must provide the government with copies of any songs he writes moving forward, ahead of their production or promotion – and, if they are deemed to be inconsistent with his goals of rehabilitation, prosecutors could move to toughen the terms dictating his supervised release.

That mixed ruling came on Friday from US district court judge Susie Morgan in the latest development to a case that…