The crime lab at Weber State University has not engaged in any criminal conduct, but its system of management should be changed, according to law-enforcement officials and an auditor.

Attorney General Jan Graham and Davis County Attorney Mel Wilson have announced that no criminal charges would be filed against lab employees.Weber State University President Paul Thompson had asked Graham's office to investigate problems at the lab for criminal wrongdoing.

Some allegations focused on creation of a video on how to collect evidence in rape cases, while others looked at managerial issues.

Since Graham's office represents WSU and she didn't want to create the appearance of a conflict of interest, she asked the Davis County attorney's office for help.

WSU also conducted its own internal audit after state and local agencies complained that the lab had lost evidence, slowed investigations and billed the state twice for certain work.

"Several case files" were lost, the audit concluded, and "several" cases were double-billed.

The audit recommends the lab manage money better, create a new filing system and develop a computer link with the Utah Department of Public Safety. It also suggests having a written policy to identify different types of cases.