WALNUT CREEK, Calif. (KGO) -- An East Bay man charged with killing his estranged partner in Walnut Creek entered a plea of not guilty Wednesday.
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Gregory Prokopowicz, 38, entered the plea against the advice of his public defender who wanted to delay the arraignment until Thursday.
Prokopowicz is accused of shooting 47-year-old Roselyn Policarpio near Larkey Park last Thursday afternoon.
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Police tracked him to Martinez and an 18-hour standoff ensued as he sat in a car near a gas station. Police took him into custody last Friday afternoon.
Walnut Creek homicide suspect pleads not guilty