Before i continue i am basing this off British units and im not sure if any of these exist in the US however consider them being implemented as fictional units, I also know that some of these have been discussed previously but i want to go a bit more in depth. I am suggesting some to make the game a bit more in depth as you could argue that some of these rolls would be fulfilled by units in game but if we have separate units for some then it would give us more in depth game play and would give more units to both EMS and police.
A lot of these units are used by police forces in the US.
Police van, would be required at 7 police stations, unit would cost 10K, would be required at mass brawls and public order incidents, it could also be used as a patrol car, it holds 6 officers and can transport 3 suspects.
K-9 unit, would be required at 9 police stations, Unit would cost 11K and would require advanced training, this unit would be required for incidents such as hostage taking etc, It would also fulfil the role of 2 police cars however it cant transport anyone, it would hold 1 officer.
Police command unit, Unit would cost 19K, would be required at 14 Police stations and would have to attend all high profile incidents involving police. It would require advanced training ad can carry a maximum of 6 people.
Traffic unit, Unit would cost 7K, Would be required at 6 police stations, it would attend road accidents and can also be used as a normal patrol car, it can carry 2 people.
Light Swat unit, unit would cost 10K, Would be required at 10 police stations, it would require SWAT training, 2 of these would count as 1 SWAT truck, it can carry 2-4 people.
Bomb squad, would be required at 13 police stations, unit would cost 15K and require special training. It would be sent to unexploded bomb calls or terror incidents. it would carry 2 people
K-9 Training, It would take 3 days to complete
EOD Technician, It would take 7 Days to complete
Sargent training, It would take 5 days to complete ad can be used on any personnel in any vehicle and would speed up the completion of large police incidents
Large Custody Facility, this building would cost 300K and it can hold 15 prisoners
Ambulance Rescue, Would cost 12K, would be able to treat patients to the level of fly cars and would also be able to attend fire jobs and fulfil the role as a Heavy Rescue. It would also require special training and can carry up to 4 paramedics
Ambulance Command unit, unit would cost 19K and would be required at all large casualty incidents (10+), it would require specialist training and would carry up to 6 people
Ambulance Hazmat, Unit would cost the same as fire Hazmat and could fulfil the role of fire hazmat but its personnel could treat the patients to a higher level than the fire one, it would require special training and it would carry up to 6 people
Mass Casualty Unit, Unit would cost 15K and would have to ability to transport 8 Casualties, it would carry up to 4 paramedics
Edit to HEMS, it would require 3 you to have three people in one helicopter
USAR Training, this would take 5 days and would be required for the heavy rescue unit
Command unit, this would take 5 days and would be required for the command unit.
Hazmat training, would take three days.
Emergency Doctor training, This training can be used for any paramedics and would decrease the chance of casualties having to be transported to hospital, this would be required for the air ambulance and it would take 7 days.
Ambulance Training School, Would cost 500K and have all of the upgrade options of the police and fire schools
These are just a few ideas, feel free to debate it but if you are going to debate it can you look at it from a bigger picture rather than what your local area uses.