Arnulfo Reyes, a teacher wounded in last month’s mass shooting at a Robb Elementary school (in the adjoining classroom to room #112) said in an emotional interview that he will never forgive law enforcement for waiting more than an hour to stop the gunman who killed 19 students and two teachers.

“After everything, I get more angry, because you have a bulletproof vest. I had nothing! I had nothing,” a crying Reyes said in a segment broadcast on “Good Morning America.” “You’re supposed to protect and serve. There is no excuse for their actions.”

Arnulfo Reyes, who was hospitalized after being shot twice during the May 24 massacre at Robb Elementary School, described what happened after they heard gunshots.

“The kids started asking out loud, ‘Mr. Reyes, what is going on?’ ” he recalled. “And I said, ‘I don’t know what’s going on, but let’s go ahead and get under the table. Get under the table and act like you’re asleep.’ ”

He was gathering them under the table when he turned and saw the gunman. It would be an hour before police stormed the classroom.

He cried remembering his students who were killed. Shaking his head, he said: “I’m sorry. I tried my best with what I was told to do. Please don’t be angry with me.”