JOHANNESBURG (AP) — Prosecutors at Oscar Pistorius’ murder trial have presented a “golden thread” of evidence suggesting Reeva Steenkamp screamed before she died, leaving the double-amputee athlete with “serious questions” to answer and his defense likely hinging on his own testimony, a legal expert in South Africa said.

Three neighbors say they heard a woman scream before and during the deadly gunshots coming from Pistorius’ home in the early hours of Valentine’s Day last year. The pathologist who performed the autopsy on Steenkamp’s body said it would have been “abnormal” for her not to scream from some of her injuries.