Lets start with the law
MD law (§ 3-502) states
(b) Impersonating police officer prohibited.- A person may not, with fraudulent design on person or property, falsely represent that the person is a police officer, special police officer, sheriff, deputy sheriff, or constable.
The maximum punishment is 2 years in jail and a fine of $2000
For the false statement that is found at (§ 9-501)
(a) Prohibited.- A person may not make, or cause to be made, a statement, report, or complaint that the person knows to be false as a whole or in material part, to a law enforcement officer of the State, of a county, municipal corporation, or other political subdivision of the State, or of the Maryland-National Capital Park and Planning Police with intent to deceive and to cause an investigation or other action to be taken as a result of the statement, report, or complaint.
(b) Penalty.- A person who violates this section is guilty of a misdemeanor
and on conviction is subject to imprisonment not exceeding 6 months or a fine not exceeding $500 or both.
So you can be prosecuted, put into jail
That said, if you have no prior arrests/convictions? Then I would not expect you to do ANY jail time. Much more likely probation
and perhaps a fine.
But you are facing a potential felony charge...so you will want to have an attorney assist you navigating this through the court. They can help you negotiate a plea agreement, minimize the charges and, most likely avoid any jail time
Let me know if you have more questions..happy to assist if I can