diff --git a/convictions_data/management/commands/chrgdesc2category.py b/convictions_data/management/commands/chrgdesc2category.py
index 1df872d..2f3d7d4 100644
--- a/convictions_data/management/commands/chrgdesc2category.py
+++ b/convictions_data/management/commands/chrgdesc2category.py
@@ -1,66 +1,124 @@
-import logging
+from __future__ import division
 
 from django.core.management.base import BaseCommand
-from django.db import transaction
 
-from convictions_data.models import Disposition
+from convictions_data.models import Conviction
 from convictions_data.statute import (get_iucr, IUCRLookupError,
     ILCSLookupError, StatuteFormatError)
 
-from pprint import pprint
 import json
 
-# can't find a handler?
-#logger = logging.getLogger(__name__)
 
+FIRST_TIME = True
 
-def append_or_create(dict, chrgdesc, category):
-    if category:
-        try:
-            categories = dict[chrgdesc]
-            if category not in categories:
-                dict[chrgdesc].append(category)
-        except KeyError:
-            dict[chrgdesc] = [category]
+def true_once():
+    global FIRST_TIME
+    if FIRST_TIME:
+        FIRST_TIME = not FIRST_TIME
+        return True
     else:
-        # warn if there's no IUCR category for this disposition
-        assert False
+        return False
 
-class Command(BaseCommand):
-    help = "Map charge descriptions to iucr categories."
 
-    def handle(self, *args, **options):
+def div(x, y):
+    try:
+        return round((x / y), 4) * 100
+    except ZeroDivisionError:
+        return 0
 
-        chrgdesc_to_category = {}
 
-        for disposition in Disposition.objects.all():
+def update_or_create(dict, chrgdesc, new_categories):
+    try:
+        present_categories = dict[chrgdesc]
+        for c in new_categories:
+            if c not in present_categories:
+                dict[chrgdesc].append(c)
+    except KeyError:
+        dict[chrgdesc] = new_categories
 
-            chrgdesc = disposition.ammndchrgdescr if \
-                    disposition.ammndchrgdescr else disposition.chrgdesc
-            category = disposition.iucr_category
 
-            case_number = disposition.case_number
-            statute = disposition.final_statute if \
-                    disposition.final_statute else disposition.statute
-            chrgdisp = disposition.chrgdisp
-            chrgdispdate = disposition.chrgdispdate
+class Command(BaseCommand):
+    help = \
+        """  
+        Try to generate, as close as possible, 
+        a one-to-one mapping between charge 
+        descriptions and iucr categories.
+        """
+
+    def handle(self, *args, **options):
 
-            try:
-                append_or_create(chrgdesc_to_category, chrgdesc, category)
-            except AssertionError:
-                # print('No IUCR category for disposition: {} {} {} {}'
-                #         .format(case_number, statute, chrgdispdate, chrgdisp))
-                pass
+        print('inside the command')
 
-        print('num total: ', len(chrgdesc_to_category))
+        chrgdesc_to_category = {}
+        hit = 0
+
+        convictions = Conviction.objects.all()
+        total = convictions.count()
+
+        for i, conviction in enumerate(convictions):
+
+            if true_once():
+                print('inside the iteration')
+
+            chrgdesc = conviction.final_chrgdesc
+            category = conviction.iucr_category
+            statute = conviction.final_statute
+
+            # if exactly one IUCR code / category is associated
+            # with this conviction, map it to the conviction's
+            # charge description;
+
+            # also make sure that the category can be found in the crosswalk's 
+            # list of possible categories and is not just somehow in the database
+            if category and category not in [o.offense_category for o in get_iucr(statute)]:
+                category = ''
+
+            if category:
+                update_or_create(chrgdesc_to_category, chrgdesc, [category])
+                hit += 1
+
+            # otherwise, check if the conviction doesn't have an IUCR
+            # because multiple possible IUCRs matched the conviction's statute   
+            else:                
+                try:
+                    offenses = get_iucr(statute)
+                except IUCRLookupError:
+                    continue
+                except ILCSLookupError:
+                    continue
+                except StatuteFormatError:
+                    continue
+
+                if len(offenses) >= 1:
+                    # if so, check if all possible IUCRs associated with
+                    # that statute map to a single charge description;
+                    if len(set([o.offense_category for o in offenses])) == 1:
+                        category = offenses[0].offense_category
+
+                        update_or_create(chrgdesc_to_category, chrgdesc, [category])
+                        hit += 1
+                    else:
+                        categories = list(set([o.offense_category for o in offenses]))
+                        update_or_create(chrgdesc_to_category, chrgdesc, categories)
+
+            print "{}% one-to-one mapping".format(div(hit, i))
+
+        print 'num total: ', len(chrgdesc_to_category)
+        print 'writing file with all'
         with open('chrgdesc_to_category__all.json', 'w') as f:
             json.dump(chrgdesc_to_category, f)
 
-        chrgdesc_to_category = {x: chrgdesc_to_category[x] for x in chrgdesc_to_category.keys() if len(chrgdesc_to_category[x]) > 1}
+        chrgdesc_to_category_multiples = {x: chrgdesc_to_category[x] for x in chrgdesc_to_category.keys() if len(chrgdesc_to_category[x]) > 1}
         
+        print 'num chrgdesc that map to multiple possible IUCR categories: ', len(chrgdesc_to_category_multiples)
+        print 'writing multiples file'
         with open('chrgdesc_to_category__multiples.json', 'w') as f:
-            print('num with multiple: ', len(chrgdesc_to_category))
-            json.dump(chrgdesc_to_category, f)
+            json.dump(chrgdesc_to_category_multiples, f)
+
+        print ('num convictions whose chrgdesc maps to multiple possible '
+              'IUCR categories: {}').format(total - hit)
+
+        print 'done'
 
 
 
diff --git a/convictions_data/management/commands/disambiguate.py b/convictions_data/management/commands/disambiguate.py
new file mode 100644
index 0000000..742907d
--- /dev/null
+++ b/convictions_data/management/commands/disambiguate.py
@@ -0,0 +1,120 @@
+from __future__ import division
+
+from django.core.management.base import BaseCommand
+from django.db.models import Count
+
+from convictions_data.models import Conviction
+from convictions_data.statute import get_iucr, IUCRLookupError, \
+    ILCSLookupError, StatuteFormatError
+
+import json, sys
+
+
+def prefix_fmt(num_break):
+    return '    ' * num_break
+
+def suffix_fmt(num_break):
+    return '\n' * num_break
+
+def fmt(msg, prefix, suffix):
+    prefix = prefix_fmt(prefix)
+    suffix = suffix_fmt(suffix)
+    print "{0}{1} ...{2}".format(prefix, msg, suffix)
+
+def fmt_item(name, item, prefix, suffix):
+    if not item:
+        item = 'This value is empty.'
+        
+    msg='{}: {}'.format(name, item)
+    fmt(msg, prefix, suffix)
+
+def set_formatting(loop_level):
+    # no indent, two newlines
+    # at first loop level
+    if loop_level == 0:
+        return 0, 2
+
+    # one indent, two new lines
+    # at second loop level
+    if loop_level == 1:
+        return 1, 2
+
+    # two indents, one new line
+    # at third loop level
+    if loop_level == 2:
+        return 2, 1
+
+
+class Command(BaseCommand):
+    help = \
+        """  
+        Do some work...
+        """
+
+    def handle(self, *args, **options):
+
+        with open('chrgdesc_to_category__multiples.json') as f:
+
+            START_LOOP = 0
+            prefix = None
+            suffix = None
+
+            multiples = json.load(f)
+
+            print '\n'
+            print 'Total num of multiples: {}'.format(len(multiples))
+            print '\n\n'
+
+            for chrgdesc in multiples:
+
+                loop_level = START_LOOP
+                prefix, suffix = set_formatting(loop_level)
+
+                fmt_item('chrgdesc', chrgdesc, prefix, 0)
+
+                convictions = Conviction.objects.filter(final_chrgdesc=chrgdesc).values('final_statute').annotate(Count('id')).order_by()
+                num_convictons = convictions.count()
+                fmt('Num of statutes: {}'.format(num_convictons), prefix, suffix)
+
+                for i, c in enumerate(convictions):
+
+                    statute = c['final_statute']
+
+                    loop_level = 1
+                    prefix, suffix = set_formatting(loop_level)    
+
+                    fmt_item('statute', statute, prefix, 0)
+                    fmt('Num statutes left: {}'.format(num_convictons - (i+1)), prefix, suffix)                    
+                    try:
+
+                        loop_level = 2
+                        prefix, suffix = set_formatting(loop_level)
+
+                        o_tuples = [(o.code, o.offense_category) for o in get_iucr(statute)]
+                        fmt_item('codes', [o[0] for o in o_tuples], prefix, suffix)
+                        fmt_item('categories', [o[1] for o in o_tuples], prefix, suffix)
+                        
+                    except IUCRLookupError:
+                        fmt('IUCRLookupError occurred', prefix, suffix)
+                    except ILCSLookupError:
+                        fmt('ILCSLookupError occurred', prefix, suffix)
+                    except StatuteFormatError:
+                        fmt('StatuteFormatError occurred', prefix, suffix)
+
+                    finally:
+
+                        try:
+                            cmd = raw_input('>> ')
+                        except KeyboardInterrupt:
+                            print '\ndone!'
+                            sys.exit(0)
+
+                        if cmd == 'n':
+                            break
+                        print '\n'
+
+        print 'done!'
+
+
+
+