diff --git a/agent-framework/prometheus_swarm/utils/duplicate_evidence.py b/agent-framework/prometheus_swarm/utils/duplicate_evidence.py
new file mode 100644
index 00000000..fdd3f843
--- /dev/null
+++ b/agent-framework/prometheus_swarm/utils/duplicate_evidence.py
@@ -0,0 +1,75 @@
+import logging
+from typing import Any, List, Dict
+
+class DuplicateEvidenceError(Exception):
+    """Custom exception for duplicate evidence scenarios."""
+    pass
+
+def check_duplicate_evidence(evidence_list: List[Dict[str, Any]], 
+                              unique_key: str = 'id') -> List[Dict[str, Any]]:
+    """
+    Check for duplicate evidence based on a unique key.
+
+    Args:
+        evidence_list (List[Dict[str, Any]]): List of evidence dictionaries
+        unique_key (str, optional): Key to use for identifying duplicates. Defaults to 'id'.
+
+    Returns:
+        List[Dict[str, Any]]: List of unique evidence entries
+
+    Raises:
+        DuplicateEvidenceError: If duplicate evidence is detected and cannot be resolved
+    """
+    # Configure logging
+    logger = logging.getLogger(__name__)
+    logger.setLevel(logging.INFO)
+
+    # Check if logging handler exists, if not add a stream handler
+    if not logger.handlers:
+        handler = logging.StreamHandler()
+        formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+        handler.setFormatter(formatter)
+        logger.addHandler(handler)
+
+    # Track unique and duplicate evidence
+    unique_evidence = []
+    duplicate_evidence = []
+    seen_keys = set()
+
+    for evidence in evidence_list:
+        # Check if the unique key exists
+        if unique_key not in evidence:
+            logger.warning(f"Evidence missing unique key '{unique_key}': {evidence}")
+            unique_evidence.append(evidence)
+            continue
+
+        unique_value = evidence[unique_key]
+
+        # Check for duplicates
+        if unique_value in seen_keys:
+            duplicate_evidence.append(evidence)
+            logger.warning(f"Duplicate evidence detected: {evidence}")
+        else:
+            seen_keys.add(unique_value)
+            unique_evidence.append(evidence)
+
+    # If duplicates are found, raise an error or log a warning based on severity
+    if duplicate_evidence:
+        logger.error(f"Found {len(duplicate_evidence)} duplicate evidence entries")
+        raise DuplicateEvidenceError(f"Duplicate evidence detected: {duplicate_evidence}")
+
+    return unique_evidence
+
+def log_duplicate_evidence(duplicate_entries: List[Dict[str, Any]], 
+                            log_level: int = logging.WARNING) -> None:
+    """
+    Log duplicate evidence entries with specified log level.
+
+    Args:
+        duplicate_entries (List[Dict[str, Any]]): List of duplicate evidence entries
+        log_level (int, optional): Logging level. Defaults to logging.WARNING.
+    """
+    logger = logging.getLogger(__name__)
+    
+    for entry in duplicate_entries:
+        logger.log(log_level, f"Duplicate Evidence: {entry}")
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diff --git a/agent-framework/tests/unit/test_duplicate_evidence.py b/agent-framework/tests/unit/test_duplicate_evidence.py
new file mode 100644
index 00000000..67e7477b
--- /dev/null
+++ b/agent-framework/tests/unit/test_duplicate_evidence.py
@@ -0,0 +1,74 @@
+import pytest
+import logging
+from prometheus_swarm.utils.duplicate_evidence import (
+    check_duplicate_evidence, 
+    DuplicateEvidenceError, 
+    log_duplicate_evidence
+)
+
+def test_check_duplicate_evidence_no_duplicates():
+    """Test checking evidence with no duplicates."""
+    evidence_list = [
+        {'id': 1, 'data': 'first'},
+        {'id': 2, 'data': 'second'},
+        {'id': 3, 'data': 'third'}
+    ]
+    result = check_duplicate_evidence(evidence_list)
+    assert len(result) == 3
+
+def test_check_duplicate_evidence_with_duplicates():
+    """Test checking evidence with duplicates."""
+    evidence_list = [
+        {'id': 1, 'data': 'first'},
+        {'id': 2, 'data': 'second'},
+        {'id': 1, 'data': 'duplicate'}
+    ]
+    with pytest.raises(DuplicateEvidenceError):
+        check_duplicate_evidence(evidence_list)
+
+def test_check_duplicate_evidence_custom_unique_key():
+    """Test checking evidence with a custom unique key."""
+    evidence_list = [
+        {'uuid': 'a1', 'data': 'first'},
+        {'uuid': 'b2', 'data': 'second'},
+        {'uuid': 'a1', 'data': 'duplicate'}
+    ]
+    with pytest.raises(DuplicateEvidenceError):
+        check_duplicate_evidence(evidence_list, unique_key='uuid')
+
+def test_check_duplicate_evidence_missing_key():
+    """Test handling evidence with missing unique key."""
+    evidence_list = [
+        {'id': 1, 'data': 'first'},
+        {'data': 'no id'},
+        {'id': 2, 'data': 'second'}
+    ]
+    result = check_duplicate_evidence(evidence_list)
+    assert len(result) == 3
+
+def test_log_duplicate_evidence(caplog):
+    """Test logging of duplicate evidence."""
+    caplog.set_level(logging.WARNING)
+    duplicate_entries = [
+        {'id': 1, 'data': 'duplicate 1'},
+        {'id': 2, 'data': 'duplicate 2'}
+    ]
+    
+    log_duplicate_evidence(duplicate_entries)
+    
+    assert len(caplog.records) == 2
+    assert all('Duplicate Evidence' in record.message for record in caplog.records)
+    assert all(record.levelno == logging.WARNING for record in caplog.records)
+
+def test_log_duplicate_evidence_custom_log_level(caplog):
+    """Test logging of duplicate evidence with custom log level."""
+    caplog.set_level(logging.ERROR)
+    duplicate_entries = [
+        {'id': 1, 'data': 'duplicate 1'}
+    ]
+    
+    log_duplicate_evidence(duplicate_entries, log_level=logging.ERROR)
+    
+    assert len(caplog.records) == 1
+    assert caplog.records[0].levelno == logging.ERROR
+    assert 'Duplicate Evidence' in caplog.records[0].message
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