TEWKSBURY (CBS) – Police arrested a suspected “serial tagger” who allegedly vandalized dozens of locations in Tewksbury, including a September 11 memorial.

Joshua Chisholm of Lowell was arrested on Tuesday. He was charged with 20 counts of vandalizing property and two counts of vandalizing a memorial.

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Joshua Chisholm. (Image Credit: Tewksbury Police)

The spray painting incidents have been reported throughout Tewksbury since May. Locations hit included bathroom walls, park benches, light posts, dumpsters, electrical boxes, barrels, and the 9/11 memorial.

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Vandalism allegedly committed by Joshua Chisholm. (Image Credit: Tewksbury Police)

Prosecutors said Chisholm, who was staying at a sober house in Lowell, had distinctive markings in his graffiti that helped police track him down.

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Chisholm was arraigned in Lowell District Court on Wednesday. He was released on personal recognizance bail on several conditions. He must stay away from all 22 locations he allegedly tagged and follow all rules of the sober house he is staying at.