The story
Abbott's Meat started in 1907 on the University of Michigan-Flint parking ramp's future site. When the Flint-style coney began in the 1920s, Abbott's began making coney sauce.
In July 2007, Abbott's Meat, had voluntarily recalled 26,600 pounds of meat products due to a possible E. coli contamination. E. coli was detected by regular testing with no reported illnesses. All Halo Burger locations were shut down for a day due to the recall.
From Wikipedia’s article on Abbott's Meat, shared under CC BY-SA 4.0.3