The four people accused of murdering legal secretary Gail Spencer now face new charges from a grand jury.
Tracy Jones, Michael Brett Kelly, Courtney Kelly and Keith Dozier already faced one count each of malice murder as well as some lesser charges.
On Tuesday, a grand jury tacked on three counts each of felony murder.
Prosecutors say Spencer was suffocated in her home last October.
They believe Spencer was killed as part of an embezzlement plot against the Macon law office where she worked.
The four defendants remain in the Bibb County jail.