As for the info you requested, Marcel will continue in Dedicated. It will give +1 BAB and Defense

, +1 to Fort and Will saves, 7 skill points to be spent on Knowledge (Military Science) +1, Knowledge (Earth and Life sciences) +1, Listen +1, Spot +2, Survival +1, and, of course, Treat Injury +1. The Dedicated Bonus feat will be Medical Expert, for +2 on Craft (Pharm) and Treat Injury checks. Third level feat will be tougher to pick; I'm currently between Alertness, Endurace, Improved Initiative, Renown, and Run. I didn't notice anything on the Game Mechanics list that really grabbed me. Did you have any ideas?
I expect I will someday take the Field Medic prestige class, just to get the boost in hp healed and the Medical Mastery class ability (Unless you want to make it a feat. Maybe a prerequisite of 6 ranks in Treat Injury and both the Surgery and Medical Expert feats?

). I would rather continue as Charismatic/Dedicated than jump into a prestige class, generally.
As for the ranks in Knowledge (Local, Algiers), I assumed Marcel spent time there chasing skirts. He loves the city, or rather, any city. Coffee shops, nightclubs, and beautiful girls; ahhhhhhhhh. I assume his focus would be on the hot spots for picking up girls and having a good time, not politics or where the closest police station is.
I still want to buy a motorcycle for him someday. If we spend a good chunk of time off duty in an urban setting, he will pick up a nice used bike.