Two Texas men looking for an "adrenalin rush" said they found it by abducting a mentally impaired 19-year-old workmate, using her for target practice and finally shooting her dead.

In harrowing interviews with a Dallas television station KDFW late Thursday, the two men chuckled and grinned as they confessed to a bizarre story of abducting and murdering Amy Robinson Feb. 15."I'd probably have to say it was just for the adrenalin rush," Robert Neville, 23, said in the jail-house interview.

The other self-confessed killer, 18-year-old Michael Hall, said they picked on Robinson because she was trusting and so would offer no resistance.