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Sam Lucassie, 20, is already serving time for assault and a home invasion. He was back in court for two new charges. (Laura Wright/CBC)

A man already serving time for a home invasion and sexual assault with a weapon, will serve another four months for new charges. 

Sam Lucassie, 20, is currently in custody in Iqaluit. Lawyers spoke to his latest charges Tuesday at the Nunavut Court of Justice.

Lucassie pleaded guilty to two new assault charges. He was sentenced to four more months of jail time.

Court heard that on March 24, Lucassie sucker-punched another inmate and then assaulted a youth officer who tried to intervene. Lucassie grabbed a pen and stabbed the officer several times.

Lucassie had been serving time at the youth centre because of his age, despite being convicted as an adult in February for a violent home invasion and sexual assault in 2010.

Now, he's at the Baffin Correctional Centre in Iqaluit, and will likely move to a federal prison in the South because of the new convictions.

Before sentencing Lucassie, Justice Sue Cooper said she was very disappointed in him. She said people and staff at the youth centre have to be protected.