Ichabod Crane has been murdered and the police begin to suspect Headless Horseman is the culprit. They want to find the murder weapon and go to Horseman's house one night, without a warrant. They walk into Horseman's house, brandishing guns, and find Horseman watching TV. They begin rifling through closets and papers and they handcuff Horseman. Horseman says, "OK, I confess. I killed him. I guess I lost my head." At Horseman's trial, is his statement admissible against him? Explain your answer.