Incident Overview - An attack occurred, with evidence suggesting an ideological motive targeting ICE officers, not migrants [2][3] - The FBI director shared a photo of unspent shell casings engraved with an anti-ICE message [1][2] - The attack is being investigated, with the FBI and partners pursuing those who target law enforcement [3] Weaponry and Tactics - The weapon used was likely an AR-15 style, fired from an elevated position approximately 150 yards away [5] - The attacker's skill level could have resulted in more injury and death with better precision [6] - The attacker used rooftop vantage point and engraving on ammo [9] Security Concerns - Federal facilities are generally not hardened, making them vulnerable to politically motivated attacks [7] - Securing rooftops and implementing counter-surveillance measures are important for high-security buildings [10][11] - It's impossible to defend against every potential threat, despite counter-surveillance and roving patrols [9] Law Enforcement Response and Protocol - The FBI director's sharing of evidence photos is considered unusual and potentially problematic for prosecutors [4][13] - The FBI director is concerned about law enforcement officer safety and attacks against law enforcement [14] Potential for Copycat Attacks - There is concern about people emulating this type of attack, including the use of engravings [15][16] - The use of engravings may be an attempt to communicate a message and the reasons behind the attack [17][18]