deleting jail

[Matt]

I'm trying to remove an old jail I don't use any more.  From single user 
mode, I mount the relevant partition and try:

prompt# rm - rf  old_jail

rm: old_jail/dumb/rcp: Operation not permitted
rm: old_jail/dumb: Directory not empty
rm: old_jail/lib/libcrypt.so.2: Operation not permitted
rm: old_jail/lib/libc.so.5: Operation not permitted
rm: old_jail/lib: Directory not empty
rm: old_jail/libexec/ld-elf.so.1: Operation not permitted
rm: old_jail/libexec: Directory not empty
rm: old_jail/sbin/init: Operation not permitted
rm: old_jail/sbin: Directory not empty
rm: old_jail/usr/bin/ksu: Operation not permitted
rm: old_jail/usr/bin/chpass: Operation not permitted
rm: old_jail/usr/bin/chfn: Operation not permitted
rm: old_jail/usr/bin/chsh: Operation not permitted
rm: old_jail/usr/bin/ypchpass: Operation not permitted
rm: old_jail/usr/bin/ypchfn: Operation not permitted
rm: old_jail/usr/bin/ypchsh: Operation not permitted
rm: old_jail/usr/bin/login: Operation not permitted
rm: old_jail/usr/bin/opieinfo: Operation not permitted
rm: old_jail/usr/bin/opiepasswd: Operation not permitted
rm: old_jail/usr/bin/passwd: Operation not permitted
rm: old_jail/usr/bin/yppasswd: Operation not permitted
rm: old_jail/usr/bin/rlogin: Operation not permitted
rm: old_jail/usr/bin/rsh: Operation not permitted
rm: old_jail/usr/bin/su: Operation not permitted
rm: old_jail/usr/bin/crontab: Operation not permitted
rm: old_jail/usr/bin: Directory not empty
rm: old_jail/usr/lib/libc_r.so.5: Operation not permitted
rm: old_jail/usr/lib/libkse.so.1: Operation not permitted
rm: old_jail/usr/lib/libthr.so.1: Operation not permitted
rm: old_jail/usr/lib: Directory not empty
rm: old_jail/usr/sbin/sliplogin: Operation not permitted
rm: old_jail/usr/sbin: Directory not empty
rm: old_jail/usr/home/jail/bin/rcp: Operation not permitted
rm: old_jail/usr/home/jail/bin: Directory not empty
rm: old_jail/usr/home/jail/sbin/init: Operation not permitted
rm: old_jail/usr/home/jail/sbin: Directory not empty
rm: old_jail/usr/home/jail/usr/bin/cu: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/uucp: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/uuname: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/uustat: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/uux: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/man: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/chpass: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/chfn: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/chsh: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/ypchpass: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/ypchfn: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/ypchsh: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/login: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/opieinfo: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/opiepasswd: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/passwd: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/yppasswd: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/rlogin: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/rsh: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/su: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/tip: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin/crontab: Operation not permitted
rm: old_jail/usr/home/jail/usr/bin: Directory not empty
rm: old_jail/usr/home/jail/usr/lib/libcrypt.so.2: Operation not permitted
rm: old_jail/usr/home/jail/usr/lib/libc.so.4: Operation not permitted
rm: old_jail/usr/home/jail/usr/lib/libc_r.so.4: Operation not permitted
rm: old_jail/usr/home/jail/usr/lib/libcipher.so.2: Operation not permitted
rm: old_jail/usr/home/jail/usr/lib: Directory not empty
rm: old_jail/usr/home/jail/usr/libexec/ld-elf.so.1: Operation not permitted
rm: old_jail/usr/home/jail/usr/libexec: Directory not empty
rm: old_jail/usr/home/jail/usr/sbin/sliplogin: Operation not permitted
rm: old_jail/usr/home/jail/usr/sbin: Directory not empty
rm: old_jail/usr/home/jail/usr: Directory not empty
rm: old_jail/usr/home/jail/var/empty: Operation not permitted
rm: old_jail/usr/home/jail/var: Directory not empty
rm: old_jail/usr/home/jail: Directory not empty
rm: old_jail/usr/home: Directory not empty
rm: old_jail/usr: Directory not empty
rm: old_jail/var/empty: Operation not permitted
rm: old_jail/var: Directory not empty
rm: old_jail/: Directory not empty

I saw a jail_delete utility in an older version of jailutils, but the 
newer version I built from ports doesn't have it.  Thanks for any help.