WATERLOO, Ill. — The Ethical Society of Police is calling out a St. Louis police lieutenant because of a post on social media.

The post appears to be from Lt. Jerry Foster's Facebook account. It says, "I'm not sure what the hell is going on in our country these days. I just drove by an authentic Mexican restaurant in town; and there were white guys putting on a new roof, cutting the grass and doing landscaping."

While the post doesn't mention which specific restaurant, the location stamp shows it was posted from Waterloo. People who live in Waterloo tell 5 On Your Side there are only two authentic Mexican restaurants in town.

Casa Romero Mexican Restaurant is under construction. The other restaurant, Tequila Mexican Restaurant, is not.

Jorge Salazar is a server at Casa Romero.

"It's a good place," Salazar said. "It's busy all the time and we don't have very much tables."

The restaurant has been closed for the past week because the owner is expanding the space. It’s scheduled to reopen Tuesday. Evidently, the construction caught Foster's attention.

The post ends with a laughing emoji. Rev. Darryl Gray, community liaison of the Ethical Society of Police, says it's no joke.

"It is racially insensitive at the least." Gray said. "This is someone's foundation. Their cultural foundational understanding of black versus white or white versus brown or us versus them."

The Ethical Society tweeted a screenshot saying this isn't the first this lieutenant has posted something like this.

"We're going to challenge it and expose it," Gray said. "He should be fired. We've already submitted that there should be, as part of a screening process with recruits, some type of psychological training that would help weed out racists or people who have racists tendencies."

The St. Louis Metropolitan Police Department sent 5 On Your Side a statement, which says, "We are aware of the posts. The views expressed in the posts in no way represent the views of the Metropolitan Police Department, City of St. Louis. The matter is currently under investigation. Lt. Jerry Foster has been on the force 29 years."

Gray planned to attend a clergy leadership meeting with St. Louis Police Chief John Hayden Monday evening. Gray says he planned to ask the chief whether the department has a "zero tolerance policy on racism."