NORTH COAST, Calif. – Detectives from the Sonoma County Sheriff’s Office have made an eighth arrest in last week’s home invasion robberies in Petaluma.

Jade Lafay Johnson, a 19-year-old woman from Winston-Salem, North Carolina, was arrested for her part in the robberies on Thursday, according to Sgt. Spencer Crum.

Authorities said three residences in the 100 and 200 block of Eugenia Drive in Petaluma were robbed at gunpoint on March 12, as Lake County News has reported.

Crum said the suspects – who tied up residents and pistol-whipped one of them – were looking for marijuana but got the wrong homes.

All eight suspects are from the East Coast, primarily Richmond, Va., and Winston-Salem, North Carolina, Crum said.

Four men were arrested on March 12 after a pursuit to Novato: Chrisshawn Denardray Beal, 20, and Jaray Day-Shawn Simmons, 28, both of Winston-Salem; and Melvin Corbin, 19, of Richmond, Va., officials reported.

The sheriff’s office said it took three other men into custody later that evening at San Francisco Airport as they were trying to board a plane to the East Coast. The men arrested at that time are 22-year-old Nakia Robert Lydell Jones, 20-year-old Romello Shamar Jones and 21-year-old Siddiq Jafar Abdullah, all from Richmond, Va.

At the time of those arrests, authorities said they were still looking for two more suspects, a black woman and a black man.

Once Jones was identified as a suspect in the case, Crum said detectives secured a $1 million arrest warrant and worked closely with detectives from the Winston-Salem Police Department.

Johnson was arrested on Thursday during a traffic stop in Winston-Salem. She was taken into custody without incident, Crum said.