Rule Clarification -- Technical FT's

[Indy_Ref]

I've read...and RE-read...both the casebook & the rules book about a designated FT'er and can't decide what is the proper ruling. Here is the sitch:

Technical FT's, coach designates A1 to shoot. A1 misses first shot. Coach jumps off bench and wants A2 to shoot the next one. It didn't seem logical to me that A2 could shoot the second FT, and before I could "guess" and make a final ruling on the second FT, A1 pleaded with coach and said he'd make the second shot. I turned to coach and say, "Come on coach, give him a chance. He said he'd make it!" Coach laughs, looks at me and says, "Ok, but you look that one up after the game!"

I discussed this after the game with 2 other referees. We even got out our rule books & casebooks!! After reading through BOTH several times, we could not come up with THE FINAL CORRECT ANSWER!! HELP!!

By the way, he MISSED the second one too!!