The man charged with gunning down a suburban St. Louis pastor in the middle of his sermon, and injuring two others marked the day as "death day" in his planner, prosecutors said.
Terry Sedlacek, 27, has been charged with first-degree murder in the shooting which claimed the life of Rev. Fred Winters. He has been also been charged with aggravated battery for allegedly wounding two worshippers who fought to subdue him after he allegedly pulled a knife.
Madison County State's Attorney William Mudge says investigators found the planner in the Sedlacek's home and that he brought enough rounds of ammunition to the Church to kill 30 people.
Investigators say four rounds were fired before the his gun jammed.
Prosecutors aren't commenting on a motive, according to Stephanee Smith of the Madison County State's Attorney's Office.
Chief Judge Ann Callis on Monday also ordered Sedlacek held without bond. He remains hospitalized in St. Louis with self-inflicted knife wounds.
One of the parishioners also remains hospitalized in serious condition.
The St. Louis Post-Dispatch reported late Sunday that Sedlacek had developed mental illness while suffering from Lyme disease, according to his family. FOX News could not immediately confirm the report.
According to the newspaper, the man's mother, Ruth Abernathy, said he contracted the disease after he was bitten by a tick on a family farm in the late 1990s. She described him as an avid outdoorsman and hunter.
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The man was taking several medications to combat the disease and seizures, which nearly killed him in 2003, the paper reported.
Neighbors, who believed Sedlacek was mentally ill, told a reporter he would sometimes wander into the middle of the road and shout obscenities for no reason.
The Associated Press contributed to this report.