Using crontab to end a process

[Kent Kostuk]

I am an OpenBSD neophyte and couldn't track this down in the archives. 
If this has been covered before please let me know how to track this 
information down.

I would like to schedule mplayer to record a radio station's online feed 
but can't figure out how to stop process.  In Linux I was able to use 
killall mplayer.  But that doesn't appear to be an option under OpenBSD. 
 What do I need to do?

Kent Kostuk