The Baraboo father accused of murdering his infant twins is being held on $1 million bond. David Yates made his first court appearance in Sauk County Court this afternoon.Baraboo police believe the person who killed the infant twins they found on Sunday night was their father. The Sauk County District Attorney's office has now charged him with David Yates with murder.District Attorney Patricia Barrett told 27 News she's confident Yates is responsible.The two babies were only five-weeks oldTheir mother went to pick them up on Sunday from their dad. But he wouldn't answer the door, so she called police, and they say they found the worst. David Yates is facing two counts of first degree intentional murder. Here's what the criminal complaint says happened: At 8 o'clock on Sunday, the babies' mother, Susan Winbun, went to the father's house on Lake Street to pick up the kids. She banged on the door and tried calling, but Yates didn't answer - so she left. She came back later Sunday evening. She rang the doorbell again, still no answer, and she could see through the window the TV and fireplace were still on. That's when she got very nervous, so she called police. When they got there, they found Yates passed out in bed. He changed his story about where the kids were, so police searched the house. Later, they found the babies stuffed under the bed. An autopsy determined the children died from multiple blunt force trauma, cuts and broken ribs. Yates has a history of violence - he's been charged with domestic abuse, was sentenced to a year of probation, and he's a five-time drunk driver.We talked to their mother yesterday. As you can imagine, she was extremely upset and emotionally broken. She said the babies usually lived with her.But she took them to the father's house for the weekend.Yates is in the Sauk County Jail tonight. He was initially only arrested on a probation hold Sunday.Meanwhile, his attorney, Paul Polacek, filed two motions asking the court to order medication for Yates. According to the motion, without proper medication for behavior problems, Yates would be subject to "unpredictable manic behavior...danger to himself and others...and suicidal tendencies."