defunct processes

I've got a defunct squid server process. It refuses to release the port or die. I've tried killing it over and over...

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[root@jackal jackal]# kill -9 8561 8563 8565
[root@jackal jackal]# kill -9 8561 8563 8565
[root@jackal jackal]# kill -9 8561 8563 8565
[root@jackal jackal]# kill -9 8561 8563 8565
[root@jackal jackal]# ps -aef|grep squid
root      8561     1  0 Jun09 ?        00:00:00 [squid] 
squid     8563     1  0 Jun09 ?        00:24:51 (squid) -D
squid     8565  8563  0 Jun09 ?        00:00:03 [unlinkd] 
root     24282 24222  0 13:43 pts/2    00:00:00 grep squid
[root@jackal jackal]# kill -9 8561 8563 8565
[root@jackal jackal]# kill -9 8561 8563 8565
[root@jackal jackal]# kill -9 8561 8563 8565
[root@jackal jackal]# kill -9 8561 8563 8565

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My only solution is to reboot???

That's so.... windows....