Police arrest, charge man after he allegedly poisoned neighbors | USA TODAY

Police arrested Xuming Li after he allegedly injected a chemical underneath his neighbors' door over a noise dispute in Tampa, Florida.

After a hidden camera showed Xuming Li using a syringe to inject a chemical into the bottom of a door, he was charged with three counts of battery for dispersed chemical agent, possession of a controlled substances, aggravated stalking and battery on law enforcement via the chemical agent, according to the arrest affidavit out of Hillsborough County.

Li was a doctorate student in the chemistry department at the University of Florida between 2018 and the summer of 2023, according to a USF spokesperson. He has pleaded not guilty to the charges and his attorney declined to comment further on the matter.