A 10-year-old Florida boy is under arrest for allegedly threatening by text to conduct a mass shooting, police in Lee County said Sunday. The boy was arrested Saturday and charged with Making a Written Threat to Conduct a Mass Shooting after the Patriot Elementary School fifth-grader sent a threatening text message, the Lee County Sheriff’s Office said. “This student’s behavior is sickening, especially after the recent tragedy in Uvalde, Texas,” Sheriff Carmine Marceno said in a statement. “Making sure our children are safe is paramount. We will have law and order in our schools! My team didn’…