I did a little research, and something like this may be possible. A number of institutions offer combined bachelors/masters degree programs in criminology, criminal justice, and other related fields. (For example, the John Jay College of Criminal Justice, part of CUNY in New York, has a such a program.) I presume that these programs are largely intended for people, like yourself, who already have career experience in law enforcement and related fields. Googling for "combined bachelors masters programs criminal justice" should turn up a few more similar programs.
It's hard to say whether a particular program like this would work for you. For example, I don't know whether your funding sources would be satisfied with you being enrolled in a joint bachelors/masters program. The John Jay program I linked to also has additional reqirements for transfer students, which might be problematic.
However, since many gradate programs in these fields cater specifically toward people who have already spent time working in law enforcement, many more places may have policies in place for addressing the needs of people like you. If there are specific institutions that you are interested (local to you, for example), I would suggest contacting them (possibly in person) to see whether they have programs to help you. You are probably going have to earn a bachelors degree on the way to your masters, but they may be able to classify you as a masters student for the full duration of your program.