"As soon as we found out about the charges, we informed both schools with letters, crafted those immediately," said Amy Grau, a spokesperson with the Archdiocese of Milwaukee.
According to the criminal complaint, Buelow faces a first-degree sexual assault of a child charge, which has a maximum sentence of 60 years upon conviction.
Buelow allegedly molested a 4th grader in the church basement at St. Matthias multiple times during private tutoring sessions, according to the criminal complaint.
Other students also said they were touched inappropriately by Buelow.
Buelow is currently a teacher at Holy Apostles School in New Berlin, and he has been placed on administrative leave. In a letter to Holy Apostles families, the school said they are cooperating with police.
"There was nothing in all the things we've checked, the background checks, the safe environment training, that would have indicated any issues," said Grau. "Unfortunately even background checks can’t predict if an employee is going to continue with our moral and ethical expectations."
Buelow was a 4th-grade teacher at St. Matthias from 2001 to 2013. The alleged incident happened in 2012.
He's been at Holy Apostles since 2013.
The school asked anyone with information concerning Buelow to call Milwaukee Police at 414-935-7401.