(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, trespassing in a habitation when a person is present or likely to be present, 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 section 2923.421 of the Revised Code, or the commission of a violation of any provision of Chapter 3734. of the Revised Code, other than section 3734.18 of the Revised Code, 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.

(A) No person, purposely or knowingly, and when purpose or knowledge is sufficient culpability for the commission of an offense, shall engage in conduct that, if successful, would constitute or result in the offense.

(B) It is no defense to a charge under this section that, in retrospect, commission of the offense that was the object of the attempt was either factually or legally impossible under the attendant circumstances, if that offense could have been committed had the attendant circumstances been as the actor believed them to be.

(C) No person who is convicted of committing a specific offense, of complicity in the commission of an offense, or of conspiracy to commit an offense shall be convicted of an attempt to commit the same offense in violation of this section.

(D) It is an affirmative defense to a charge under this section that the actor abandoned the actor's effort to commit the offense or otherwise prevented its commission, under circumstances manifesting a complete and voluntary renunciation of the actor's criminal purpose.

(A) No person, acting with the kind of culpability required for the commission of an offense, shall do any of the following:

(1) Solicit or procure another to commit the offense;

(2) Aid or abet another in committing the offense;

(3) Conspire with another to commit the offense in violation of section 2923.01 of the Revised Code;

(4) Cause an innocent or irresponsible person to commit the offense.

(B) It is no defense to a charge under this section that no person with whom the accused was in complicity has been convicted as a principal offender.

(C) No person shall be convicted of complicity under this section unless an offense is actually committed, but a person may be convicted of complicity in an attempt to commit an offense in violation of section 2923.02 of the Revised Code.