PHOENIX — Cynthia Mary Roberson is an unemployed mother who police say led her 12- and 14-year-old sons and their friends to commit at least 20 armed robberies and assaults, including the beating of a teenage boy who had nothing more than an orange lollipop.

Her motivation was purely financial — police said she needed money to pay rent and the loan on her gold Chevrolet. In every case, the mother drove the getaway car and once coached a kid during a robbery because he was having trouble stealing a cell phone from a victim, police said.

The case has outraged authorities and the public and drawn comparisons to "Ma Barker," the infamous mother who led her four young sons on a robbery spree in the early 1900s.

"In the days of the Depression, Ma Barker took her sons and they robbed banks and did this and did that for a living until they got caught," Phoenix police Detective James Holmes said. "Now I've got this lady with her kids and her crew of other bad guys and they're pretty much robbing people all because she didn't have a job."

The similarities between the cases are striking.

Barker was born into poverty in the early 1870s, and encouraged her four boys from an early age to commit drug store and other business robberies in the Joplin, Mo., area, according to Jack Koblas, a historian and author of two books about Barker.

Koblas said Barker would advise her sons and other neighborhood boys on what stores to rob and how, while her straight-arrow husband was at work. As many as 15 boys would gather at her ramshackle house to plan crimes.

By the age of 10, Barker's boys had all been in trouble with the law, Koblas said.

"She was more or less the ringleader of the gang," Koblas said. "She was the one who directed them, led them and was responsible for them becoming the grown-ups they did become."

At the time of her arrest in late May, the 51-year-old Roberson lived in what police described as a filthy Phoenix apartment with her two sons, ages 12 and 14, and five other young boys and men between 14 and 20 years old.

Phoenix police say Roberson had recently lost her job and persuaded her sons and the others living with her to commit robberies to help pay for rent and her car loan.

Phoenix police Sgt. Phil Roberts described Roberson as the ringleader, driving the youngsters to robberies in parks and along streets in Phoenix.

"I think she absolutely had a lot of influence," Roberts said. "She's driving them out, telling them how to do it — basically saying, 'Let's go out and let's commit a robbery tonight,' and then instructing some of the suspects on how to do the robbery and how the robbery should go down."