FORT WORTH, Texas—Mothers Against Drunk Driving is re-evaluating its “Cookies for Cops” program, and several police departments are being more cautious about homemade treats after this week’s scare over deliveries of suspected drug-laced treats.

But police stations won’t stop accepting brownies and other goodies because they say most citizens simply want to show their appreciation.

“We’re not going to let something like this mar that kind of relationship,” Lake Worth Police Chief Brett McGuire said.

Earlier this week when a teenager walked into the Lake Worth police station with a basket of chocolate chip cookies, officers smelled marijuana and did preliminary tests that found LSD, McGuire said. Then officers brought in a drug dog that indicated illegal substances were in the cookies and the teen’s car, McGuire said.

Lake Worth had been tipped off by police in nearby Blue Mound, where preliminary tests on cookies had shown traces of marijuana, said Blue Mound police Lt. Thomas Cain.

Christian V. Phillips, 18, was charged with tampering with a consumer product, a second-degree felony that carries a maximum penalty of 20 years in prison, and jailed in Lake Worth on $75,000 bond.

But two days later after county lab tests showed no traces of drugs in the Lake Worth and Blue Mound cookies, the charge was dropped and Phillips was released.

Drug tests are pending on several Fort Worth and Watauga officers who ate cookies delivered there. No illnesses were reported.

“During the holidays, we have elderly people bring us stuff ... and sometimes people from City Council,” Cain said. “But if we don’t know them, we’re not going to eat it.”

Phillips, who was doing community service for MADD, had denied putting any drugs in the cookies and said his friend may have been smoking pot while he was baking, McGuire said.

Phillips chose to do community service with MADD’s North Texas chapter to fulfill about 80 hours as part of his sentence last year in his pretrial memorandum agreement, something for first-time offenders, said his attorney L. Patrick Davis.

Phillips was charged with assault of a public servant, a felony, after being arrested at a party last year in Watauga. The charge was later reduced to assault with bodily injury, a misdemeanor.

But MADD spokeswoman Heidi Castle said the organization usually works with those arrested on alcohol-related offenses. Had it known Phillips was initially arrested for assaulting an officer, he would “absolutely not” have been allowed to distribute cookies to police stations, she said.

Castle said MADD was also trying to determine how Phillips came to be involved in the cookie program, which is new in North Texas but has been done nationwide for years.

MADD also distributes bottled water and food for officers at sobriety checkpoints in other states, she said.

“This (cookie) program won’t be stopped, but we need to figure out what safeguards are in place and are we doing it consistently across the country,” she said.