You can follow the video guide below to complete the "Safety First" mission story and finish the mission with a Silent Assassin rating.
This will also get you the following achievements if you don't have them yet:
![HITMAN 3](/imagestore/thumbs/0003617800/3617899.jpg)
The Silent Assassin achievement in HITMAN 3 worth 12 pointsComplete The Final Test unspotted. Kill only Jasper Knight, ensuring his body is not found.