diff --git a/shinigami/utils.py b/shinigami/utils.py
index cce3166..d7a84b6 100755
--- a/shinigami/utils.py
+++ b/shinigami/utils.py
@@ -10,6 +10,8 @@
 import asyncssh
 import pandas as pd
 
+INIT_PROCESS_ID = 1
+
 
 def id_in_whitelist(id_value: int, whitelist: Collection[Union[int, Tuple[int, int]]]) -> bool:
     """Return whether an ID is in a list of ID values
@@ -84,7 +86,7 @@ async def terminate_errant_processes(
         process_df = pd.read_fwf(StringIO(ps_return.stdout), widths=[11, 11, 11, 11, 500])
 
         # Identify orphaned processes and filter them by the UID whitelist
-        orphaned = process_df[process_df.PPID == 1]
+        orphaned = process_df[process_df.PPID == INIT_PROCESS_ID]
         terminate = orphaned[orphaned['UID'].apply(id_in_whitelist, whitelist=uid_whitelist)]
         for _, row in terminate.iterrows():
             logging.debug(f'[{node}] Marking for termination {dict(row)}')
@@ -93,6 +95,6 @@ async def terminate_errant_processes(
             logging.info(f'[{node}] No orphans found')
 
         elif not debug:
-            proc_id_str = ','.join(terminate.PGID.astype(str))
+            proc_id_str = ','.join(terminate.PGID.unique().astype(str))
             logging.info(f"[{node}] Sending termination signal for process groups {proc_id_str}")
-            await conn.run(f"pkill --signal -9 --pgroup {proc_id_str}", check=True)
+            await conn.run(f"pkill --signal 9 --pgroup {proc_id_str}", check=True)