the meaning of "Leave the others in a ditch."

Need more context than this.

However, based on the violence intended toward the boy, it would seem pretty literal.
The intent is to kill the people besides the boy, leave them in a ditch, and commit further violence toward the boy to get information.

Thanks, that makes sense.

Yea as A2k Marches on, it does doesn't it April. May we have more Chais

If they are left in a ditch, they are probably dead.

Sure as heck

http://www.urbandictionary.com/define.php?term=in%20a%20ditch