National Socialist Network leader Thomas Sewell has had a criminal charge dropped over his neo-Nazi group’s Australia Day weekend protest.

Melbourne resident Sewell, 31, was among 17 NSN members arrested after marching in Adelaide in January.

On Thursday, a charge of using a Nazi symbol was withdrawn in his criminal case in the Adelaide Magistrates Court.

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Sewell remains charged with one count of loitering.

Since the Australia day arrest, Sewell has since claimed that police wanted to kill members of his neo-Nazi group.

Thomas Sewell and 17 other members of the Nationalist Socialist Network were arrested on Australia day. Credit: 7NEWS

He has published audio online that allegedly captures SAPOL officers on Australia Day joking about shooting the neo-Nazi group.

“I’m happy to shoot them,” one person said.

“Happy to?” another person asked.

“I’m happy to shoot them” the first person answered.

Sewell is scheduled to return to court next week.