Groesbeck nonprofit creates initiative to install bulletproof glass in all law enforcement vehicles and last updated 2021-04-01 01:58:24-04 GROESBECK, TX â The Groesbeck community is still trying to come to terms with what happened to DPS Trooper Chad Walker, who was shot multiple times in the line of duty and later died. One local nonprofit is working to protect law enforcement while on the job. The Mutual Assistance Group, or MAG Inc., is built on helping first responders as well as military and veteran members in Limestone County, even assisting those in the area who have fallen on hard times.