Four Montgomery teens are under arrest, accused in a string of violent crimes that included armed robberies, kidnappings and gang rape of a woman.

The group is charged with a combined 31 felony crimes that happened in eight different incidents between Sept. 27 and Oct. 14, according to court records made public Thursday. In all, their combined bonds total more than $1.56 million.

Those arrested are: L’Derrick Purnell, 18; LaCorey Fuller, 19; Jasper Wright, 17 and Shar’Tavius Walker, 18. All were taken into custody over the past week and were booked into the Montgomery County Detention Center.

Purnell is charged with first-degree kidnapping, second-degree kidnapping, first-degree rape, five counts of first-degree robbery, first-degree sodomy and two counts of first-degree theft of property. His bonds total $570,000.

Wright is charged with first-degree kidnapping, four counts of first-degree robbery, four counts of first-degree theft of property, first-degree rape and first-degree sodomy. His bond his set at $540,000.

Fuller is charged with first-degree kidnapping, two counts of first-degree robbery, first-degree rape, first-degree sodomy, and two counts of theft of property. His bond is set at $360,000.

Walker is charged with second-degree kidnapping and first-degree robbery. He is being held on $90,000 bond.

Court records show the crime spree started Sept. 27 with auto theft and grew increasingly violent.

The following day - sometime between 3 p.m. and 5 p.m. on Sept. 28 - a male victim was forced into the trunk of his Hyundai Genesis and driven around to several locations, according to affidavits against the suspects. The victim’s Synovus bank card was stolen and $500 withdrawn from his account via an ATM. Court records identify Walker and Purnell as the suspects in that case.

On Oct. 1, Wright is accused of steeling a Cadillac from a gas station on Troy Highway. The next day, records state, Wright and Purnell robbed a woman of her purse and credit cards outside a home on South Hull Street. Later that same day, Purnell and Wright are accused of robbing a man of his cell phone and wallet on Iris Lane.

The violence escalated on Oct. 14, records show, when a woman getting into her car on W. Fairview Avenue was robbed of $15. But, it didn’t stop there.

According to charging documents, the woman was forced into the rear of her 2009 Dodge Avenger, at which she was driven to multiple other locations “all while being forced to engage in deviate sexual intercourse with each of the defendants and raped, repeatedly, by each of the defendants.”

Fuller, Purnell and Wright are charged in the attack of the woman. Authorities say they eventually drove her to a wooded area near Butler Mill Road, forced her out of her vehicle and fled the area, abandoning her in the woods.

Hours later – about 11: 30 p.m. – Fuller, Purnell and Wright area accused of robbing a woman of her black Michael Kors purse and $40 in cash. At 11:40 p.m., records state, the trio robbed a man on Woodley Road of his 2011 silver Hyundai Sonata valued at $8,000.

The crimes were investigated by Montgomery police.