Allen and Douglas

Marlin Police Chief Darrell Allen, left, poses with detective Rob Douglas, right, with cards and sacks of candy that school children created as a way of saying “thank you” during National Police Officer Week in May 2013.

A Marlin police detective who posted a controversial rant on his Facebook page was fired Wednesday afternoon, officials said.

Detective Rob Douglas had been on administrative leave since Monday, after Marlin officials learned of the post during the weekend.

The post on Douglas’ Facebook page discussed his frustration with seeing people at the grocery store who receive public assistance or food stamps, but who may have tattoos or expensive tire rims on their vehicles.

“I promise, if I ever snap and go on a killing spree, it will be in a supermarket on the first,” the rant concluded.

Marlin City Manager R.C. Fletcher said he was made aware of the post Sunday, but did not know when it first was published.

Fletcher said Marlin Police Chief Darrell Allen made the choice to fire Douglas.

“The decision was made based on the violation of (the) department’s rules of conduct and social media policies,” Fletcher said.

“Those inappropriate and troubling comments he made on Facebook resulted in the conditions that actually were outlined in those policies,” he said.

A section of the policy warns against discrediting the credibility of the department with “statements or other forms of speech that ridicule, malign, disparage or otherwise express bias against any race, any religion or any other protected class of individuals.”

Allen said he has been fielding calls from outside the state after he says the content “went viral” earlier this week.

Douglas worked for the Marlin Police Department for about five years before his firing, Fletcher said.

The Tribune-Herald received a screenshot of the post during the weekend but has been unable to locate Douglas for comment.