PROVO, Utah — The mistress of a Utah doctor accused of killing his wife testified Tuesday that she moved into his house nine days after the death and received a marriage proposal and a $7,000 diamond ring from the defendant within months.
The judge allowed prosecutors to aggressively question Gypsy Willis as a hostile witness after they argued that she was trying to protect Martin MacNeill with less-than-truthful answers as he stands trial on a murder charge in the death of his wife, Michele.
‘‘Are you telling us you don’t know anything more about Michele’s death?’’ prosecutor Sam Pead asked.
‘‘That is correct,’’ Willis replied.
MacNeill is accused of hounding his wife to get a face lift, then administering a lethal combination of drugs for her recovery and helping her into a tub of water in April 2007.
In previous testimony, Willis said she traded text messages with the doctor 30 times that day. On Tuesday, she said she texted suggestive photos of herself to him on the day after the funeral.
Other testimony on Tuesday featured a 2008 videotaped police interview with the family’s youngest daughter, Ada, who was 6 when she found her mother in the bathtub after returning from school with her father.
Defense lawyers declined to call the now-12-year-old girl into the courtroom for cross-examination.
‘‘She doesn’t have a credible memory to question,’’ Randy Spencer, one of Martin MacNeill’s defense lawyers, later told reporters outside court. ‘‘It’s pointless to try.’’
Willis said she had been having a sexual relationship with MacNeill for 15 months before his wife died. The doctor set her up in a duplex, gave her a debit card for expenses, and helped pay for her schooling as a nursing student, she said.
Willis said the doctor hired her as a nanny about a week after the funeral of his wife.