New Jersey prosecutions declined nearly 8 percent in 2006 as lawmen said they have shifted gears to pursue more sophisticated wrongdoers, such as corrupt officials or those in large criminal enterprises, instead of low-level criminals. “Those types of cases take time,” said Attorney General Stuart Rabner. “We’re going to put our resources more into corruption and gang cases, and those are the opposite end of the perspective in terms of complexity.” The state Division of Criminal Justice got 574 indictments and guilty pleas prior to indictment as of Dec. 21, compared to 621 in 2006. The division has been shrinking amid tight state budgets and has had turmoil at the top. It now has 152 lawyers, down 31, and 342 investigators, down 34, compared to five years ago. Rabner is the second attorney general named by Gov. Jon S. Corzine in his first year in office. Rabner replaced Zulima Farber in September. She resigned after a special prosecutor found she violated state ethics laws by going to the scene of her boyfriend’s traffic stop and allowing police to give him preferential treatment. Division Director Greg Paw said the numbers do not include the July arrests of 41 people accused of leading bloody street gang, who have not yet been indicted. Rabner said he believes a reorganization, to be completed in January, will make better use of a smaller staff.