This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.SAN DIEGO — An eventful weekend at the U.S.-Mexico border saw Border Patrol agents seize more than eight pounds of heroin, arrest a convicted sex offender and catch three other people accused of running from officials. Friday around noon, agents at a checkpoint on Interstate 8 near Pine Valley sent a suspicious vehicle in for a secondary inspection. A drug dog led agents to four packages of heroin tucked inside a fake battery compartment under the hood, Border Patrol said. The packages weighed a little over eight-and-a-half pounds, with an estimated street value of $89,700. The driver, a 23-year-old U.S. citizen, was arrested. The drugs and car were seized by Border Patrol.