Back in January, news broke that former Dallas Cowboys receiver Michael Irvin was under criminal investigation by a local police department. Now, that investigation is closed. There still are no details as to what officers with the Allen Police Department were investigating. The Dallas Morning News reported late Friday that the police closed the case weeks ago. There were no charges filed. The city of Allen is an affluent suburb north of Dallas. Pro Football Talk broke the news in January that Michael Irvin could be in legal trouble. But again, there were no details. The Allen PD confirmed to …