RALEIGH, N.C. — A North Carolina man serving a 45-year sentence for a terror plot to attack a US Marine base and overseas targets was found guilty in a murder-for-hire plot to behead witnesses who testified against him.

Hysen Sherifi, 28, of Raleigh was found guilty Thursday of nine counts related to the murder-for-hire plot, US Attorney Thomas Walker said. Sherifi will be sentenced in February, when he faces a maximum life sentence.