Could this be my timing chain?

pproblem started a week ago when my alarm went off while key was in the ignition. Couldn't shut the alarm off and car wouldn't turn over. After playing with the alarm switch and disconnecting the battery then jump starting the car was okay for a day. Next day ran over a small piece is metal, heard a screech and everything went dead. Was able to start it one last time and move it just far enough to get it off the road but now when I turn the key I get nothing and when I pull the key out the abs and brake light stay on. Had a shop check the relays tried disconnecting the battery again in an attemp to rest it but still getting nothing. Any help is appreciated.