After knocking him out—getting rid of this potential danger, she helped him up and got him to lie on the bed.
It didn't even occur to him until then that Sarah had called him out just to knock him out and get rid of him as he was the "dangerous".
From Sarah’s perspective.
She had to find out the source of the fragrance and the signal block in the room, or she would be unable to stay here for a few hours.
If letting him take a cold shower in the bathroom, it would be alright if he could control himself all the time. However, if he couldn't and run out, it would be difficult for her to get him right.
This being the case.
It would be better for her to solve it in advance.
It was much more reliable to keep the safety in her own hands.
In the following one hour, Sarah carefully and thoroughly searched the room inch by inch.