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(a) No person, with purpose to commit or to promote or facilitate the commission of aggravated murder, murder, kidnapping, abduction, compelling prostitution, promoting prostitution, trafficking in persons, aggravated arson, arson, aggravated robbery, robbery, aggravated burglary, burglary, engaging in a pattern of corrupt activity, corrupting another with drugs, a felony drug trafficking, manufacturing, processing or possession offense, theft of drugs, or illegal processing of drug documents, the commission of a felony offense of unauthorized use of a vehicle, illegally transmitting multiple commercial electronic mail messages or unauthorized access of a computer in violation of Ohio R.C. 2923.421 or the commission of a violation of any provision of Ohio R.C. Chapter 3734, other than Ohio R.C. 3734.18, that relates to hazardous wastes, shall do either of the following:
(1) With another person or persons, plan or aid in planning the commission of any of the specified offenses;
(2) Agree with another person or persons that one or more of them will engage in conduct that facilitates the commission of any of the specified offenses.
(b) No person shall be convicted of conspiracy unless a substantial overt act in furtherance of the conspiracy is alleged and proved to have been done by the accused or a person with whom the accused conspired, subsequent to the accused’s entrance into the conspiracy. For purposes of this section, an overt act is substantial when it is of a character that manifests a purpose on the part of the actor that the object of the conspiracy should be completed.
(c) When the offender knows or has reasonable cause to believe that a person with whom the offender conspires also has conspired or is conspiring with another to commit the same offense, the offender is guilty of conspiring with that other person, even though the other person’s identity may be unknown to the offender.
(d) It is no defense to a charge under this section that, in retrospect, commission of the offense that was the object of the conspiracy was impossible under the circumstances.
(e) A conspiracy terminates when the offense or offenses that are its objects are committed or when it is abandoned by all conspirators. In the absence of abandonment, it is no defense to a charge under this section that no offense that was the object of the conspiracy was committed.
(f) A person who conspires to commit more than one offense is guilty of only one conspiracy, when the offenses are the object of the same agreement or continuous conspiratorial relationship.
(g) When a person is convicted of committing or attempting to commit a specific offense or of complicity in the commission of or attempt to commit the specific offense, the person shall not be convicted of conspiracy involving the same offense.
(h) (1) No person shall be convicted of conspiracy upon the testimony of a person with whom the defendant conspired, unsupported by other evidence.
(2) If a person with whom the defendant allegedly has conspired testifies against the defendant in a case in which the defendant is charged with conspiracy and if the testimony is supported by other evidence, the court, when it charges the jury, shall state substantially the following:
“The testimony of an accomplice that is supported by other evidence does not become inadmissible because of the accomplice’s complicity, moral turpitude, or self-interest, but the admitted or claimed complicity of a witness may affect the witness’ credibility and make the witness’ testimony subject to grave suspicion, and requires that it be weighed with great caution.
It is for you, as jurors, in light of all the facts presented to you from the witness stand, to evaluate such testimony and to determine its quality and worth or its lack of quality and worth”.
(3) “Conspiracy”, as used in subsection (h)(1) of this section, does not include any conspiracy that results in an attempt to commit an offense or in the commission of an offense.
(i) The following are affirmative defenses to a charge of conspiracy:
(1) After conspiring to commit an offense, the actor thwarted the success of the conspiracy under circumstances manifesting a complete and voluntary renunciation of the actor’s criminal purpose.
(2) After conspiring to commit an offense, the actor abandoned the conspiracy prior to the commission of or attempt to commit any offense that was the object of the conspiracy, either by advising all other conspirators of the actor’s abandonment, or by informing any law enforcement authority of the existence of the conspiracy and of the actor’s participation in the conspiracy.
(j) Whoever violates this section is guilty of conspiracy, which is a misdemeanor of the first degree, when the most serious offense that is the object of the conspiracy is a felony of the fifth degree.
(k) This section does not define a separate conspiracy offense or penalty where conspiracy is defined as an offense by one or more sections of this Code, other than this section. In such a case, however:
(1) With respect to the offense specified as the object of the conspiracy in the other section or sections, subsection (a) hereof defines the voluntary act or acts and culpable mental state necessary to constitute the conspiracy;
(2) Subsections (b) to (i) hereof are incorporated by reference in the conspiracy offense defined by the other section or sections of this Code.
(l) (1) In addition to the penalties that otherwise are imposed for conspiracy, a person who is found guilty of conspiracy to engage in a pattern of corrupt activity is subject to divisions (B)(2) and (3) of Ohio R.C. 2923.32, division (A) of Ohio R.C. 2981.04 and division (D) of Ohio R.C. 2981.06.
(2) If a person is convicted of or pleads guilty to conspiracy and if the most serious offense that is the object of the conspiracy is a felony drug trafficking, manufacturing, processing or possession offense, in addition to the penalties or sanctions that may be imposed for the conspiracy under subsection (j) hereof and Ohio R.C. Chapter 2929, both of the following apply:
A. The provisions of divisions (D), (F) and (G) of Ohio R.C. 2925.03, division (D) of Ohio R.C. 2925.04, division (D) of Ohio R.C. 2925.05, division (D) of Ohio R.C. 2925.06 and division (E) of Ohio R.C. 2925.11 that pertain to mandatory and additional fines, driver’s or commercial driver’s license or permit suspensions, and professionally licensed persons and that would apply under the appropriate provisions of those divisions to a person who is convicted of or pleads guilty to the felony drug trafficking, manufacturing, processing, or possession offense that is the most serious offense that is the basis of the conspiracy shall apply to the person who is convicted of or pleads guilty to the conspiracy as if the person had been convicted or pleaded guilty to the felony drug trafficking, manufacturing, processing or possession offense that is the most serious offense that is the basis of the conspiracy.
B. The court that imposes sentence upon the person who is convicted of or pleads guilty to the conspiracy shall comply with the provisions identified as being applicable under subsection (l)(2) of this section, in addition to any other penalty or sanction that it imposes for the conspiracy under subsection (j) of this section and Ohio R.C. Chapter 2929.
(m) As used in this section:
(1) “Felony drug trafficking, manufacturing, processing or possession offense” means any of the following that is a felony:
A. A violation of Ohio R.C. 2925.03, 2925.04, 2925.05, or 2925.06;
B. A violation of Ohio R.C. 2925.11 that is not a minor drug possession offense.
(2) “Minor drug possession offense” has the same meaning as in Ohio R.C. 2925.01.