<h1>Rooftop gunman opens fire at federal immigration facility, killing detainee, wounding two; shooter dies by apparent suicide</h1> A shooter opened fire from a nearby rooftop at a federal immigration enforcement facility, killing one detainee and critically wounding two others before dying by apparent suicide; no agents were injured. Federal authorities are investigating the incident as an act of targeted violence, and law enforcement reported finding an item at the scene bearing an 'ANTI-ICE' message. The Department of Homeland Security described the attack as indiscriminate and confirmed victims were shot in a sallyport area. The matter is under joint local and federal investigation with potential criminal and national-security implications.