(You're doing really well, but just so you know, when you use a jutsu in a mission, it's a good idea to add it to the bottom of your post in a spoiler, like this:
*[Desert Coffin]
B-Ranked Ninjutsu
After forming the needed handseals, the user will cause a small wave of sand to rise from the ground at their feet and roll towards the intended target with a speed equal to the user's control up a total of 8 yards away. If the target doesn't avoid this jutsu they will be ensnared by sand that starts to wrap around their legs, restraining them in place. The sand will then rise up to fully encase the target. This technique will hold the target in place for three posts, but they can break out of the sand if they have a strength of 6 or higher.
(Also, remember that you can't just
decide you caught someone. This guy's a civilian with no chance of escaping, so yeah, he's caught pretty much. But if this were a higher-ranked mission I could have made him a ninja and given him a way of avoiding it. That's what I mean when I say the words "Tried" and "attempted" are your friends. You're doing really well, though, and you've just about finished the mission. Between two to four more of your posts will have it over, if this keeps up.)
The man squealed aloud when the sand had him risen in the air.
"You're a ninja!' He writhed in Kanjo's grips and tried to break out, but when Kanjo started speaking the an understood.
"Family, I'm family!" He seemed eager to align himself with Kanjo's sentiment. It seemed he valued his life. That made this easy.
Now, Kanjo just had to go in and find the others who were cheating. It was possible that the man would be able to help with that, and make the whole process faster. But that would require trusting the man. Was Kanjo willing to accept him as "family"?