Three Hickman seniors were arrested after outdoor areas at Rock Bridge High School were found spray painted.
Police said they arrested five groups of at least two or more people committing burglaries together across the city.
Four officers will focus solely on traffic violations such as speeding, driving without a seat belt or running red lights.
The school principal e-mailed parents on Monday about the increased safety measures, which were implemented after a man was arrested on suspicion of trespassing last week.
Brendan William Orscheln was arrested on suspicion of first-degree arson and was held in the Boone County Jail on $250,000 bond.
The unidentified man was suspected of trespassing Tuesday morning. He was stunned outside Subway on Ninth Street and later taken to University Hospital.
The owner, Ronald Kinsel, was killed in a car accident on Nov. 9. Several items including money, jewelry and a computer are missing from the home.
Lee Wyatt Carter, 23, was arrested Tuesday on suspicion of second-degree robbery and second-degree murder, Columbia police said.
Columbia police arrested eight individuals on suspicion of taking part in as many as 19 recent burglaries.
Ferguson's father said the decision was no surprise and will allow Ferguson's legal team to file a habeas corpus petition in which he can present new evidence not available during the first trial.
Attorney Chris Slusher said he is also contemplating requesting a change of venue for the felony charge because the case has received a lot of publicity in Boone County.
A teenage girl was stabbed in the arm during the incident that preceded the arrests.
Michael L.W. Maurer Jr. was brought into custody without incident.
While speaking with Mallory Simpson, sheriff's deputies found drug paraphernalia in plain view in her purse and found more, along with methamphetamine and cocaine, in a subsequent search.
A Rockaway Beach man was indicted Tuesday by a federal grand jury in connection with bank robberies in Columbia and Sedalia.
Citizens and police can continue using Tasers in Columbia after Proposition 2 was roundly defeated. The group People for a Taser-Free Columbia planned to issue a statement Wednesday.
As part of the scam, callers claimed to be family members who needed money to be bailed out of a Canadian jail.
Ahmed Salau was arrested on Friday, and bond was set at $150,000.
Donna Book was arrested Saturday on charges of first-degree arson and domestic assault. She is also suspected in an incident on Thursday, where witnesses said she set fire to a blanket outside of her boyfriend's bedroom.
Between Oct. 23 and Saturday, 33 burglaries were reported in Columbia, and 89 burglaries were reported for the month of October, according to Columbia Police Department news release.