Criminal Law: IPC ka Sambandhit Mudda - Me Still Confused Hai

Maine socha tha I understand wala hoon par ab exam kabhi 3 din mein hai aur maine abhi tak yeh ek cheez samjhayi nahi.. Ek case mein, jo 2 friends ne ek murder kiya tha, woh dono ek doosre ki sharminda hai aur police ki taraf se jo FIR ki gayi thi, voh dono wapsi karenge, FIR ko withdraw karenge aur dono ko free chhod denge. Yeh to abhi tak samjhey nahin ja raha hai. IPC ki Section 302 ka kya hoga? Yeh 2 friends ko bhi kyun samjha nahi ja ra hai? Kya unka FIR withdraw karna unhe innocent banana nahi jayega?