I think the drug slot needs to directly combat the drug trade.
The Drug Enforcement Administration (DEA) is a United States federal law enforcement agency under the U.S. Department of Justice, tasked with combating drug smuggling and use within the United States.
-The DEA Special Operations Division (SOD) is a division within the DEA, which forwards information from wiretaps, intercepts and databases from various sources to federal agents and local law enforcement officials.
I think the SOD would be the easiest to include. A quick example I can think of would be a ping when someone has dealt with a npc in regards to drug processing. maybe make it come say 5 minutes give or take before the ping to simulate a informant calling and reporting the incident and then a the drug officer has a time limit to find them before they are considered lost. but while they are on the hunt they can come fast and hard to find them.
-Special Response Teams (SRT) missions consist of High-risk arrests, Vehicle assault, Specialized Surveillance, Custody of High-Profile Individuals, Dignitary and Witness Protection, Tactical Surveillance and Interdiction, Advance Breaching, Tactical Training to other police units, Urban and Rural Fugitive Searches.
I kind of like the idea of after maybe a drug slot officer that dose not succeed at catching his pray then can become marked and tracked in some way. SRT could receive notice of this and spend the next set amount of time keeping him from being killed.
the DEA also has a Aviation Dev. I feel like this could be used in many way ie: insertion of tactical teams, visual air support . maybe even a bird that can be used for offense