[RSMo. §575.120]
A. 
A person commits the offense of false impersonation if he:
1. 
Falsely represents himself to be a public servant with purpose to induce another to submit to his pretended official authority or to rely upon his pretended official acts, and
a. 
Performs an act in that pretended capacity; or
b. 
Causes another to act in reliance upon his pretended official authority; or
2. 
Falsely represents himself to be a person licensed to practice or engage in any profession for which a license is required by the laws of this State with purpose to induce another to rely upon such representation; and
a. 
Performs an act in that pretended capacity; or
b. 
Causes another to act in reliance upon such representation.
[RSMo. §575.150]
A. 
A person commits the offense of resisting or interfering with arrest if, knowing that a Law Enforcement Officer is making an arrest, for the purpose of preventing the Office from effecting the arrest, he:
1. 
Resists the arrest of himself by using or threatening the use of violence or physical force or by fleeing from such Officer; or
2. 
Interferes with the arrest of another person by using or threatening the use of violence, physical force or physical interference.
B. 
This Section applies to arrests with or without warrants and to arrests for any offense or ordinance violation.
C. 
It is no defense to a prosection under Subsection (A) of this Section that the Law Enforcement Officer was acting unlawfully in making the arrest. However, nothing in this Section shall be construed to bar civil suits for unlawful arrest.
[RSMo. §575.160]
A. 
A person commits the offense of interference with legal process if, knowing any person is authorized by law to serve process, for the purpose of preventing such person from effecting the service of any process, he interferes with or obstructs such person.
B. 
"Process" includes any writ, summons, subpoena, warrant other than an arrest warrant, or other process or order of a court.
[RSMo. §575.080]
A. 
A person commits the offense of making a false report if he knowingly:
1. 
Gives false information to a Law Enforcement Officer for the purpose of implicating another person in an offense; or
2. 
Makes a false report to a Law Enforcement Officer that an offense has occurred or is about to occur; or
3. 
Make a false report or causes a false report to be made to a Law Enforcement Officer, security officer, fire department or other organization, official or volunteer, which deals with emergencies involving danger to life or property that a fire or other incident calling for an emergency response has occurred.
B. 
It is a defense to a prosecution under Subsection (A) of this Section that the actor retracted the false statement or report before the Law Enforcement Officer or any other person took substantial action in reliance thereon.
C. 
The defendant shall have the burden of injecting the issue of retraction under Subsection (B) of this Section.
[RSMo. §565.083]
A. 
A person commits the offense of assault of a Law Enforcement Officer in the third degree if:
1. 
He attempts to cause or recklessly causes physical injury to a Law Enforcement Officer;
2. 
With criminal negligence he causes physical injury to a Law Enforcement Officer by means of a deadly weapon;
3. 
He purposely places a Law Enforcement Officer in apprehension of immediate physical injury;
4. 
He recklessly engages in conduct which creates a grave risk of death or serious physical injury to a Law Enforcement Officer; or
5. 
He knowingly causes or attempts to cause physical contact with a Law Enforcement Officer without the consent of the Law Enforcement Officer.
[RSMo. §§575.200.1, 575.210.1]
A. 
A person commits the offense of escape from custody or attempted escape from custody if, while being held in custody after arrest for any offense, he escapes or attempts to escape from custody.
B. 
A person commits the crime of escape or attempted escape from confinement if, while being held in confinement after arrest for any crime, or while serving a sentence after conviction for any crime, he escapes or attempts to escape from confinement.
[RSMo. §562.041]
A. 
A person is criminally responsible for the conduct of another when:
1. 
The statute defining the offense makes him so responsible; or
2. 
Either before or during the commission of an offense with the purpose of promoting the commission of an offense, he aids or agrees to aid or attempts to aid such other person in planning, committing or attempting to commit the offense.
B. 
However, a person is not so responsible if:
1. 
He is the victim of the offense committed or attempted;
2. 
The offense is so defined that his conduct was necessarily incident to the commission or attempt to commit the offense. If his conduct constitutes a related but separate offense, he is criminally responsible for that offense but not for the conduct or offense committed or attempted by the other person;
3. 
Before the commission of the offense he abandons his purpose and gives timely warning to law enforcement authorities or otherwise makes proper effort to prevent the commission of the offense.
C. 
The defense provided by subdivision (3) of subsection (B) is an affirmative defense.