Marcum was found guilty of complicity to commit murder in the 2011 death of Angela Frazier Singleton.
Marcum was also convicted of tampering with physical evidence and hindering prosecution.
Angela was married to Marcum’s ex-boyfriend, Jason Singleton.
Police accused Marcum of strangling Angela to death.
Jason Singleton is already in prison after admitting that he cut up Angela’s body and dumped her remains in a field.
But Singleton claimed it was Marcum who killed Angela.
Marcum is scheduled to be sentenced on May 23rd.