It took a Brooklyn jury just one hour to convict a rapist who preyed on a 12-year-old girl.

The jury found yesterday that Adam Wright, 43, had dragged his victim to the roof of an apartment building in Canarsie and sexually assaulted her several times.

Wright, acting as his own attorney, argued that DNA recovered from the 2002 rape was contaminated.

But the jury convicted him of all nine charges, including four counts of rape.

He faces up to 57 years in prison.