diff --git a/java/src/org/broadinstitute/sting/oneoffprojects/walkers/varianteval/PrivatePermutations.java b/java/src/org/broadinstitute/sting/oneoffprojects/walkers/varianteval/PrivatePermutations.java
new file mode 100755
index 000000000..f266a417a
--- /dev/null
+++ b/java/src/org/broadinstitute/sting/oneoffprojects/walkers/varianteval/PrivatePermutations.java
@@ -0,0 +1,165 @@
+package org.broadinstitute.sting.oneoffprojects.walkers.varianteval;
+
+import org.broad.tribble.util.variantcontext.Genotype;
+import org.broad.tribble.util.variantcontext.VariantContext;
+import org.broadinstitute.sting.gatk.contexts.AlignmentContext;
+import org.broadinstitute.sting.gatk.contexts.ReferenceContext;
+import org.broadinstitute.sting.gatk.refdata.RefMetaDataTracker;
+import org.broadinstitute.sting.gatk.walkers.varianteval.VariantEvalWalker;
+import org.broadinstitute.sting.gatk.walkers.varianteval.VariantEvaluator;
+import org.broadinstitute.sting.utils.report.tags.Analysis;
+import org.broadinstitute.sting.utils.report.tags.DataPoint;
+import org.broadinstitute.sting.utils.report.utils.TableType;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Set;
+
+/**
+ * Created by IntelliJ IDEA.
+ * User: chartl
+ * Date: Nov 22, 2010
+ * Time: 12:22:08 PM
+ * To change this template use File | Settings | File Templates.
+ */
+@Analysis(name = "PrivatePermutations", description = "Number of additional mutations from each new sample; random permutations")
+public class PrivatePermutations extends VariantEvaluator {
+    private final int NUM_PERMUTATIONS = 50;
+    private final double LOW_GQ_PCT = 0.95;
+    private final double LOW_GQ_THRSH = 30.0;
+    private boolean initialized = false;
+    private long skipped = 0l;
+
+    @DataPoint(name="Marginal Number of Mutations",description="Number of additional mutations from each new sample; random permutations")
+    AdditionalBySample permuteCounts = null;
+
+    String[][] permutations;
+
+    public boolean enabled() {
+        return true;
+    }
+
+    public int getComparisonOrder() {
+        return 2;
+    }
+
+    public String getName() {
+        return "PrivatePermutations";
+    }
+
+    public String update2(VariantContext eval, VariantContext comp, RefMetaDataTracker tracker, ReferenceContext ref, AlignmentContext context) {
+        if ( eval != null && ! initialized ) {
+            this.veWalker.getLogger().warn("Initializing...");
+            initialize(eval);
+            initialized = true;
+        }
+
+        if ( isGood(eval) ) {
+            if ( comp != null && ! comp.isFiltered() ) {
+                return null;
+            }
+
+            int order_offset = 0;
+            for ( String[] ordering : permutations ) {
+                int sample_offset = 0;
+                for ( String sample : ordering ) {
+                    if ( eval.getGenotype(sample).isHet() || eval.getGenotype(sample).isHomVar() ) {
+                        break;
+                    }
+                    sample_offset ++;
+                }
+
+                permuteCounts.additionalValue[order_offset][sample_offset]++;
+                order_offset++;
+            }
+        } else {
+            skipped++;    
+        }
+
+        return null;
+    }
+
+    private boolean isGood(VariantContext vc) {
+        if ( vc == null || vc.isFiltered() || (vc.getHetCount() + vc.getHomVarCount() == 0) ) { // todo -- should be is variant, but need to ensure no alt alleles at ref sites
+            return false;
+        } else {
+            Collection<Genotype> gtypes = vc.getGenotypes().values();
+            int ngood = 0;
+            for ( Genotype g : gtypes) {
+                if ( g.getPhredScaledQual() >= LOW_GQ_THRSH ) {
+                    ngood ++;
+                }
+            }
+
+            return ( (0.0+ngood)/(0.0+gtypes.size()) >= LOW_GQ_PCT );
+        }
+    }
+
+    public PrivatePermutations(VariantEvalWalker parent) {
+        super(parent);
+    }
+
+    public void initialize(VariantContext vc) {
+        Set<String> permuteSamples = vc.getSampleNames();
+        permutations = new String[NUM_PERMUTATIONS][permuteSamples.size()];
+        veWalker.getLogger().warn(String.format("Num samples: %d",permuteSamples.size()));
+        int offset = 0;
+        for ( String s : permuteSamples ) {
+            permutations[0][offset] = s;
+            offset ++;
+        }
+        
+        for ( int p = 1; p < NUM_PERMUTATIONS ; p++ ) {
+            permutations[p] = permutations[0].clone();
+            for ( int o = 0; o < permutations[p].length; o ++ ) {
+                int r = (int) Math.floor(Math.random()*(o+1));
+                String swap = permutations[p][r];
+                permutations[p][r] = permutations[p][o];
+                permutations[p][o] = swap;
+            }
+        }
+
+        permuteCounts = new AdditionalBySample();
+        permuteCounts.additionalValue = new int[NUM_PERMUTATIONS][permuteSamples.size()];
+    }
+
+    class AdditionalBySample implements TableType {
+        int[][] additionalValue;
+        //String[][] permutationNames;
+        String[] rowKeys = null;
+        String[] colKeys = null;
+
+        public Object[] getRowKeys() {
+            if ( rowKeys == null ) {
+                rowKeys = new String[additionalValue.length];
+                for ( int i = 0; i < additionalValue.length; i ++ ) {
+                    rowKeys[i] = String.format("%s%d","P",i);
+                }
+            }
+
+
+            return rowKeys;
+        }
+
+        public String getCell(int x, int y) {
+            return String.format("%d",additionalValue[x][y]);
+        }
+
+        public String getName() { return "Marginal Number of Mutations"; }
+
+        public Object[] getColumnKeys() {
+            if ( colKeys == null ) {
+                colKeys = new String[additionalValue[0].length];
+                for ( int i = 0; i < additionalValue[0].length; i ++ ) {
+                    colKeys[i] = String.format("%s%d","S",i);
+                }
+            }
+
+            return colKeys;
+        }
+    }
+
+    public void finalizeEvaluation() {
+        veWalker.getLogger().info(String.format("Skipped: %d",skipped));    
+    }
+}