I don't have a DOS.
What does DOS mean?

It's from police slang, but the context's missing.
"...on the vehicles but I don't have a DOS. So it looks like the two victims will be there on scene for contact."

Question

I don't have a DOS.
What does DOS mean?

It's from police slang, but the context's missing.
"...on the vehicles but I don't have a DOS. So it looks like the two victims will be there on scene for contact."

Answer

Maybe "dead on scene"?
Source: http://www.abbreviations.com/DOS