A forensic artist on Monday is expected to develop a sketch of the woman Fort Myers police believe abducted a one-month-old baby at knifepoint.

Police say little Bryan Santos Gomes and his mother were kidnapped Friday by a woman driving a black Sport utility vehicle. Authorities say the mother, Maria Fatima Ramos Dos Santos, was released south of Fort Myers a short time later, but the abductor kept the baby.

Authorities say Bryan may be in the custody of a white heavyset female with long, straight black hair that was partially in a bun, wearing blue jeans and a black silk blouse or black t-shirt at the time of the abduction. The Fort Myers Police Department described her as 28 to 30 years old with light skin who spoke Spanish. She is 5’4” tall.

Click here for more information from the Fort Myers police on the investigation

Click here to see photos of missing baby Bryan

The missing infant is described as a white male, weighs 12 pounds, and has fine black hair.

Authorities say they believe the baby isn't in danger, and that the woman took him because she wants to take care of him. However, she is believed to be armed and could be dangerous if threatened, police said.

The abductor's vehicle is described as a dark-colored, two-door SUV with peeling window tint.

Over the weekend, police said they believed the suspect could be heading to Miami or Tampa.

The mother and Bryan, as well as another woman and a baby, were approached by the woman in the SUV while walking along a road Friday, police said. The driver asked for directions to a neighborhood. The women, who did not know the driver, agreed to give directions and entered the vehicle with their children, police said.

The women showed the driver the neighborhood, and she drove the two mothers and children back toward where she picked them up, police said. The driver then forced one mother and child out of the car, and made off with Ramos and the baby, who was born Nov. 3, police said.

The Fort Myers Police Department teamed up Saturday with the Florida Department of Law Enforcement, the FBI and other area police agencies to find the baby. An Amber Alert was issued.

Click here to read about the Amber Alert issued Monday for a 5-year-old Alabama boy

Anyone with information about the baby is asked to contact the Fort Myers Police Department at 239-338-2120 or call 911.

The Associated Press contributed to this report.