diff --git a/ttcn3-tcpdump-stop.sh b/ttcn3-tcpdump-stop.sh
index faf5b2b..6796612 100755
--- a/ttcn3-tcpdump-stop.sh
+++ b/ttcn3-tcpdump-stop.sh
@@ -5,18 +5,20 @@
 TESTCASE=$1
 VERDICT="$2"
 
+SUDOSTR=""
+if ! [ "$(id -u)" = "0" ]; then
+	SUDOSTR="sudo -n"
+	# Otherwise, if sudo /usr/bin/kill, sudo /usr/bin/tcpdump cannot be run without a password prompt,
+	# and this script will hang indefinitely
+fi
+
 kill_rm_pidfile() {
-if [ -e $1 ]; then
-        PSNAME="$(ps -q "$(cat "$1")" -o comm=)"
-	if [ "$PSNAME" != "sudo" ]; then
-		kill "$(cat "$1")"
-	else
 	# NOTE: This requires you to be root or something like
 	# "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file
-		sudo kill "$(cat "$1")"
+	if ! [ -e "$1" ] && [ -s "$1" ]; then
+		$SUDOSTR kill "$(cat "$1")" 2>&1 | grep -v "No such process"
+		rm $1
 	fi
-	rm $1
-fi
 }
 
 date