and suddenly Sent exploded ...

I shoot him ... okay, make the roll, I'll make dodge one .... ooooh he dodges? ... okay, I'm not going to shoot I'll read a book instead ...
Sichr, an action was declared and confirmed. on CT2, IP1 you ram the vehicle.
if you want you CAN voluntarily discard all hits, and allow the sedan to avoid your ram leaving Tina in the open, but you can shoot her on your CT2 IP2 at the earliest.
now make your roll or allow him to dodge. regardless Sam and the Curio will have to dodge you passing by.
ps. the sedan have darkened glasses (standard) - you can turn on the radar (free), and check if there is anyone inside (detailed observation +3, make the perception roll - complex) at the cost of -2 to all further rolls, due to radar interference. By the logic however five persons took off the car, and it is a 5-passengers vessel. MAYBE there is someone in the back coffer (I wouldn't give him much chance to survive in the ramming case though).