The Austin Police Department said Steven Anthony Garza, 34, allegedly entered his neighbor's yard about 7:30 p.m. Aug. 28 and used "aggressive" hand gestures the neighbor interpreted as an invitation to fight.
Garza allegedly head-butted his neighbor and broke the antenna of the radio the other man was using to speak to his father.
Police said the neighbor fled inside his home and Garza then dumped the other man's radio and remote-controlled drone over a fence, causing $4,000 in damage to the devices.
Garza told officers he believed his neighbor was using the equipment to spy on him and the other man was using "triangulation" to speak inside his head, the arrest report said.
Garza was taken to the Travis County Jail on charges of assault causing bodily injury and criminal mischief. He was ordered held in lieu of $10,000 bond.