One of the suspects in a deadly home invasion in Brooklyn appeared in court for arraignment Friday.

Suzette Troutman pleaded not guilty to murder, assault and burglary charges at Kings County Supreme Court Friday. 

Investigators say she worked as an aide for 91-year-old Waldiman Thompson and his 100-year-old wife Ethlin.

They say she used her knowledge of their home to help plan the home invasion that left the 91-year-old dead.

Police also arrested Troutman's nephew, 27-year-old Dwyane Blackwood. He faces the same charges. 

Police say the elderly couple was tied up by Blackwood and another person on October 11. 

Ethlin was able to untie herself and call for help, but her husband went into cardiac arrest.

Police say they are still looking for a third person involved in the home invasion. He has been identified as 43-year-old Howard Morris.