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A West Woodlawn woman robbed her disabled grandfather, hitting him with a tree branch and putting a knife to his throat before stealing $150, his car keys and the deed to his house, prosecutors said today.

Lateefah Williams, 37, is charged with armed robbery, aggravated battery, aggravated possession of a stolen motor vehicle, armed home invasion and violating an order of protection in the incident Friday. Williams was ordered held in lieu of 500,000 bail in a hearing in Cook County Bond Court before Judge Laura Sullivan.

Williams’ 89-year-old grandfather recently suffered a stroke and has been staying in a rehabilitation facility, when he was dropped off at his house around 4 p.m. Friday to pick up clothes to take back to the facility, according to Assistant State’s Attorney Mary Hain.

Williams, who lives on the floor above her grandfather in the of the 6500 block of South St. Lawrence Avenue, snuck into his apartment with her boyfriend, hit her grandfather with a tree branch and demanded money, prosecutors said. When he denied having money, she put a large pocket knife to his throat.

Her grandfather then gave Williams the keys to a file cabinet, where she found $150, the deeds to his house and car, the keys to his car and his social security card, all of which she took, prosecutors said.

Williams and her boyfriend then left through the front door and drove away in her grandfather’s car. When man’s son arrived, he told his son what happened and police were called.

Williams and her boyfriend were pulled over in her grandfather’s car and arrested around 6:20 p.m. Friday. The victim had an order of protection against Williams, Hain said. Another family member also has an order of protection against her.

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