Frazer. Chloe Frazer Trophy will not unlock
I have killed 5 enemies with the silenced pistol, but the trophy didn't unlock.
This trophy requires you to get 5 consecutive kills with the Silenced Pistol without ANY form of enemy detection
This means you cannot allow them to see the Jeep, or other dead bodies, or break stealth at any point.
It can be done across multiple encounters, but you will need to kill 5 different enemies – you cannot farm the same one through restarts.