Can I say,

(a) John's mother found him was injured and bruised his arms.

(b) John's mother found him was injured. He bruised his arms.
a) John's mother found that he was injured and had bruised his arms.
b) John's mother found him injured. He had bruised his arms.

Him/her/them can never be the subject of a conjugated verb (him was injured).
After trying many occupations, hefinally found himself and became an account executive.

you're found guilty of breaking the terms and conditions of your vehicle operator's licence

They found him out before he could launchthe rebellion.

I can'tfind my blue socks.

He found a nickel inthe street.