Published: May 27, 2014 2:49 PM EDT

CAPE CORAL, Fla.- The Cape Coral Police Department arrested two people on heroin charges last night, after a traffic stop near Palm Tree Boulevard and Cape Coral Parkway E.

Police say Luis Alfredo Benitez and Magdalena Martinez were acting strangely during the routine stop, so officers asked for a K9 to assist. When police asked both to step out, the passenger, Benitez, tried to secretly drop a syringe on the ground. Both suspects were immediately detained and a K9 alerted to the presence of narcotics.

The vehicle and occupants were searched and Martinez was found to be in possession of an unopened package of Suboxone Sublingual film and a small bag containing a broken pill. Martinez reportedly said it was Methadone. Officers also located a bag containing 31 small clear plastic bags containing heroin.

Benitez allegedly admitted that the drugs located on Martinez's person belonged to him and that he gave them to her to hide during the traffic stop. Police said Benitez also admitted to having a prior arrest for trafficking in cocaine and that he did not want his girlfriend to go to jail.

Both Benitez and Martinez were transported to CCPD. The heroin was weighed and had a pre-packaged weight of 4.6 grams. The Suboxone Sublingual film packet had a pre-packaged weight of 0.9 grams. The pill was unidentifiable by its markings and was submitted with a request to have FDLE identify it. All items, including the syringe, were submitted into evidence.