As per statute, the incident report is different than investigative reports.
Mo.Rev.Stat.§ 610.100.2.
The Arrest Record Law, Mo.Rev.Stat. § 610.100 et seq., was amended in 1995 to distinguish between arrest, incident and investigation reports of law enforcement agencies.
2. Each law enforcement agency of this state, of any county, and of any municipality shall maintain records of all incidents reported to the agency, investigations and arrests made by such law enforcement agency. All incident reports and arrest reports shall be open records. Notwithstanding any other provision of law other than the provisions of subsections 4, 5 and 6 of this section or section 320.083, investigative reports of all law enforcement agencies are closed records until the investigation becomes inactive. If any person is arrested and not charged with an offense against the law within thirty days of the person's arrest, the arrest report shall thereafter be a closed record except that the disposition portion of the record may be accessed and except as provided in section 610.120.
Arrest, incident and investigative reports are all police reports, no?