diff --git a/TODO.md b/TODO.md
index fa178c7..a12deb1 100644
--- a/TODO.md
+++ b/TODO.md
@@ -69,6 +69,6 @@ These are the features actively planned for Predator and are likely to be added
 - [ ] Complete OpenCV dashcam recording.
 - [X] Improve the efficiency of GPS location requests when many requests are made in quick succession.
     - [ ] Test that improved GPS location querying behaves as expected.
-- [ ] Kill the ALPR process every time Predator starts to ensure there are no unexpected background threads.
+- [X] Kill the ALPR process every time Predator starts to ensure there are no unexpected background threads.
 - [ ] Re-implement object recogntion to real-time mode using the new back-end.
 - [ ] Re-implement image saving in real-time mode using the new-backend.
diff --git a/alprstream.py b/alprstream.py
index 189b3f2..fdd1801 100644
--- a/alprstream.py
+++ b/alprstream.py
@@ -64,14 +64,15 @@ def alpr_stream_maintainer(): # This function runs an endless loop that maintain
                 for plate in message["results"]: # Iterate through each license plate in this line.
                     queued_plate_reads.append(plate) # Add each license plate to the license plate queue.
             else:
-                display_message("The information returned by the ALPR engine is not valid JSON. Maybe you've specified the wrong ALPR engine in the configuration?", level=3)
+                display_message("The information returned by the ALPR engine is not valid JSON. Maybe you've specified the wrong ALPR engine in the configuration?", 3)
 
 
 def start_alpr_stream(): # This function starts the ALPR stream threads.
     debug_message("Starting ALPR stream ", thread="ALPRStream")
     save_to_file(alpr_stream_file_location, "", True) # Erase the contents of the ALPR stream file.
-    alpr_stream_count = 0
+    alpr_stream_count = 0 # This will keep track of the number of ALPR streams running.
     alpr_stream_threads = {} # This is a dictionary that will hold the ALPR sub-threads.
+    os.popen("killall alpr") # Kill any ALPR processes that are running in the background in case they weren't terminated properly the last time Predator was run.
     for device in config["realtime"]["image"]["camera"]["devices"]: # Iterate through each device in the configuration.
         debug_message("Starting ALPR stream " + str(alpr_stream_count), thread="ALPRStreamMaintainer")
         print (device)
diff --git a/config.json b/config.json
old mode 100644
new mode 100755
index 423c004..7683b81
--- a/config.json
+++ b/config.json
@@ -82,8 +82,7 @@
         "image": {
             "camera": {
                 "devices": {
-                    "main": "/dev/video0",
-                    "secondary": "/dev/video2"
+                    "primary": "/dev/video2"
                 }
             }
         },