Hazmatters Haz-Matters: The Louisiana State Police (LSP), Emergency Services Unit (ESU) HMN- Today’s Haz-Matters are the troopers of The Louisiana State Police (LSP), Emergency Services Unit (ESU). We want to know about you! You can have your team, truck, or techs featured on […] Written by Ryan Henry October 28, 2016March 17, 2020