A Circuit Court jury found a 51-year-old suspected purse-snatcher guilty Thursday of two counts of robbery.

Clifford L. Rosa used a gun to rob a Starbucks in Pearl City and tried to rob an 89-year-old woman of her purse from her lap while seated in her car.

The jury found Rosa guilty of first-degree robbery, a Class A felony punishable by up to 20 years’ imprisonment, and second-degree robbery, which carries a maximum 10 years in prison.

Video surveillance and eyewitness testimony from victims and witnesses helped in the prosecution.

Sentencing is scheduled for May 26.