The character of Tim Hemmond appears in the Army Combat Uniform with the jacket tucked into his trousers. The jacket in worn untucked.
As an officer in the United States Army Tim Hemmond would have been prohibited from testifying in court without his commander's permission.
Members of the United States military are not allowed to appear in court to testify in the Army Combat Uniform. They are only allowed to appear either in civilian clothes or a service uniform (such as the green Class A or "Dress Blues").
It can be clearly seen that Tim Hammond is wearing the bar of a 1st Lieutenant on his uniform and cover, but he is later addressed as "Warrant Officer"