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Accomplice says 16-year-old led Sunday robbery plan

Nov 13, 2013 - By Katie Roenigk, Staff Writer

The woman accused of driving the getaway car during an armed robbery Sunday at Walmart said her 16-year-old co-conspirator masterminded the crime.

The teen, identified in court documents as Adrian Joseph Sixfeathers, 16, of St. Stephen's, was arrested Sunday for aggravated armed robbery, larceny and conspiracy

to commit robbery.

The alleged driver, Tiesha Underwood, 22, of Lander, was arrested for eluding police, reckless endangering, conspiracy, reckless driving and on a warrant for contempt of court.

A third suspect, Curtis Oldman, 27, of Lander, was arrested for conspiracy to commit robbery and for probation revocation.

Gas money

In interviews with investigators, Underwood said she, Sixfeathers and Oldman had been involved in the robbery.

She said Sixfeathers had suggested the three suspects go to Walmart on Sunday afternoon so he could "grab a bag" from someone.

"Underwood knew that the purpose was to get gas money," Riverton Police Department Detective Scott Gardner said in his affidavit.

The trio drove to the store in a silver Chevy Monte Carlo, and Underwood said she parked the car in the lot.

She said Sixfeathers got out of the vehicle and ran back a short time later with a purse.

"(He) told her to 'go go go,'" Gardner said.

According to witnesses and video footage, the teen had drawn a gun on a 64-year-old Riverton woman on the northwest side of the parking lot, threatening to shoot her if she didn't give him her purse.

Gardner said the woman had been leaving the store with her purchased items when Sixfeathers approached her, "pulled a black handgun out and pulled the slide back."

The woman was not injured in the incident.


After acquiring the handbag, all three suspects reportedly left the area headed south on Federal Boulevard in the Monte Carlo. A witness called police and described the vehicle, which reportedly was missing its back window.

"The back window (was) broken out with dark plastic covering the window," Gardner wrote.

The caller also identified the suspect vehicle's license plate number.

Gardner said RPD officer Amy Luton tried to stop the car near the intersection of South Federal Boulevard and East Monroe Avenue, but Underwood failed to yield.

"(The Monte Carlo) increased speed and continued southbound towards the Wind River Indian Reservation," Gardner wrote.

Luton pursued the vehicle, which eventually stopped in the 1400 block of 17 Mile Road, about five miles west of Wyoming Highway 789.

Sixfeathers and Oldman reportedly ran from the car, headed southwest through a field. Gardner said officers engaged in a foot pursuit and eventually apprehended both subjects.

"Sixfeathers ... was observed throwing an object, later identified as a pellet gun," Gardner wrote. "The pellet gun had the appearance of a semi-automatic handgun."

The robbery victim later identified the weapon as the one Sixfeathers reportedly used in the Walmart parking lot.

Gardner said Underwood stayed in the Monte Carlo during the foot chase and surrendered to police. Officers said they found the 64-year-old woman's purse in the vehicle.


Underwood and Oldman appeared in Riverton Circuit Court on Tuesday.

The charges against Underwood, including conspiracy to commit aggravated robbery and aiding and abetting aggravated robbery, come with a penalty of no less than five years and no more than 25 years in prison.

Oldman faces two charges as well: conspiracy to commit aggravated robbery, and accessory before the fact of aggravated robbery.

RPD Capt. Eric Murphy said surveillance videos show Oldman talking to Sixfeathers shortly before the alleged robbery.

"Curtis was actually standing kind of a few feet away from this kid, like he was there kind of as backup," Murphy said.

The charges against Oldman are punishable by no less than five years and no more than 25 years in prison.

Charging documents for Sixfeathers were unavailable because of his age.

Murphy did not know whether the suspects had targeted the 64-year-old Riverton woman specifically. He said her purse contained a check for $2,500.

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