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Before Sunday's arrest, Christopher Neil Bjerkness was convicted after similar incidents with exercise balls in 2005 and 2009.

Duluth 'ball slasher' arrested again

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The Duluth man known for having a sexual fetish of slashing exercise balls with a knife allegedly attempted to strike again on Sunday.


This time, Christopher Neil Bjerkness, 33, was arrested at Chester Creek Academy, a Duluth school at 714 W. College St., according to Jim Hanson, Duluth police information officer. The school is for children in treatment through Northwood Children's Services.

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