An Arizona man is facing felony charges after investigators say a campaign of unwanted messages to a former schoolmate escalated into threats of violence against her and LGBTQ+ people.Maricopa County jail records show Austin Jay Curtis, 32, of Gilbert, was arrested October 12. He faces a felony stalking charge, a felony charge of making a terrorist threat, and a misdemeanor charge of threatening or intimidating. His bond was set at $75,000.Investigators say Curtis left the woman more than 100 voicemails and contacted her through social media. The two had attended the same high school more than a decade earlier, but according to ABC 15, court records indicate they were neither friends nor former romantic partners. The woman had previously reported harassment to police in July.According to Phoenix Fox affiliate KSAZ, Curtis said in one of the voicemails that he would “drive a U-Haul through a parade of homosexuals and start firing at everybody.”Authorities have not publicly identified a specific Pride event as the intended target of the alleged attack, though Phoenix Pride took place the weekend of October 10.Related: Phoenix man arrested for allegedly threatening to shoot up LGBTQ+ bar over Charlie Kirk killingThe investigation intensified the next day, when police say Curtis arrived at the woman’s residence. She reported that someone had struck her door forcefully and called out to her. Bags and boxes were left outside the home, prompting concern because earlier messages had referred to bombs. A bomb disposal team examined the items and found no explosives.Instead, officers discovered knives, keys, dog-waste bags, and assorted belongings. Curtis later told investigators that he had left the knives because he thought the woman needed a way to defend herself.The next day, while the woman was speaking with police, Curtis allegedly called her several times. An officer listened during one conversation.After his arrest, Curtis acknowledged making threatening remarks