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DES MOINES, Iowa — A Des Moines man will spend up to 30 years in prison and the rest of his life on the sex offender registry.

A jury found 25-year-old Gerald Miller guilty of second-degree sex abuse and assault with intent to commit sex abuse causing bodily injury.

He is required to serve at least 17 and a half years before being eligible for parole.

Officials say Miller assaulted a clerk at the QuikTrip on SW 9th and Army Post Road last July.  She fought back and Miller took off but was arrested four days later.