Looks like the FBI is investigating Alan Crawford and Daphne Crawford. You might remember the two, who were escorted out of the Central mall in Fort Smith in 2015.
This apparently went down in Prairie Grove.
"According to the police report, on May 24, Alan Crawford was frustrated at Mel's Diner. Alan Crawford was upset because his order was taking too long and he thought the food was too expensive, according to the report. Alan Crawford reportedly said, "Only a Christian would treat them like that," because they practice Islam.
Before the Crawford's left Mel's Diner, it is reported that Daphne Crawford said,"People like you are the reason we kill."
LINK (I don't know anything about this website, but it appears to have some decent information about what went down.)