AceShowbiz - Federal prosecutors have recommended Allison Mack be given a lighter sentence in her racketeering case after she "provided significant... corroborated information" to the government in their case against Keith Raniere.

The former "Smallville" star pleaded guilty to the charges of sex trafficking and conspiracy to commit forced labour charges for her role in the controversial Nxivm cult two years ago, and is due to be sentenced on 30 June (21).

Ahead of her sentencing, officials filed a document suggesting that Mack should be dealt some leniency, after her assistance in the case against Nxivm's founder Raniere contributed to his conviction on seven felony counts, including sex-trafficking, child pornography, and racketeering, in October (20).

"Although Mack could have provided even more substantial assistance had she made the decision to cooperate earlier, Mack provided significant, detailed and highly corroborated information which assisted the government in its prosecution," they said in the sentencing memo.

Among the evidence Mack submitted to the court was an audio recording of Raniere talking about branding the group's members, according to a report from Variety.

"Do you think the person who's being branded should be completely nude and sort of held to the table like a sort of almost like a sacrifice?" Raniere allegedly says in the recording.

"And the person should ask to be branded. Should say, please brand me it would be an honour, or something like that. An honour I want to wear for the rest of my life, I don't know. And they should probably say that before they're held down, so it doesn't seem like they are being coerced."

Raniere was sentenced to serve 120 years behind bars following his conviction.