In a statement from Jerry Jones:
"This agreement involved an important element of our defensive scheme, specifically the pass rush, at a position that we felt we needed to address this off season. We entered this free agency period with the idea of utilizing key resources to help us on the defensive side of the ball.
"Greg is a proven and experienced player whose production has allowed him to play at a Pro Bowl level. This is a one-year agreement that is incentive based and heavily weighted toward his participation in games.
"We have spent a great deal of time over the last two days in meeting with Greg directly and gaining a solid understanding of what he is all about as a person and as a football player. A thorough background review of him, involving many elements of our organization, has been ongoing for the last few weeks.
"Obviously a great deal of our study was dedicated to the issue of domestic violence, and the recent events that associated Greg with that issue. We know that Greg's status remains under review by the National Football League.
"Our organization understands the very serious nature of domestic violence in our society and in our league. We know that Greg has a firm understanding of those issues as well."