More than 100 arrests have been made in recent months through a joint operation between the Dallas Police Department and the U.S. Marshals, an effort that targets prolific offenders in Dallas.

Operation 10/90 What we know: Operation 10/90 is a joint operation between the Dallas Police Department and the U.S. Marshals Service.

The operation, which targets violent offenders who are likely to repeat, is named for the 10% of people who make life dangerous for the other 90%.