LOS ANGELES-- O.J. Simpson's defense team was handed its first defeat when a judge refused to suppress key evidence that police found on Simpson's estate the morning after his ex-wife and a friend were slain. Ruling that the police did not make an unreasonable search, Municipal Court Judge Kathleen Kennedy-Powell said Thursday she believed detectives who testified that they entered the estate without waiting for a search warrant because they were worried about the safety of Simpson and his family. Just before dawn June 13, homicide detectives discovered a blood spot on a white Bronco parked near the property gate. That discovery alarmed them, they testified this week, and they decided to scale the wall, enter the grounds and make sure the estate residents were unharmed. They sought a search warrant later, after finding a bloodstained leather glove on the grounds.