Gin Send Off help needed

[Haj01]

i am stuck on gin send off. the enemy keeps on escaping. could u tell me what i have to do to prevent this? i kill al the enemy near the vehicles and the two in the house thn i blow up all the vehicles so thy cant escape with it. i then go to where it says pond on the map. and kill people there and sometime then it'l say the enemy has escaped .what am i doing wrong is tere other enemy for me to kill first?

please help me, thankyou