kill all processes

i have a very short file that has in it a line for a find command.

now, when i run this script and I kill the script later, using the ps -ef | grep scriptname. i noticed kill -9 kills the script itself but does not kill the internal find command that it gave birth to.

say theres a file called jumbo. and in that file i have a find / print > whatever

now, when i do a ps -ef | grep jumbo and I kill jumbo. jumbo does as expected and dies. but the find command inside of it is left running.

how do i go about killing a script and every other process or user associated with it?