Jason Dalton’s best man at his wedding is shocked by what the Uber driver has done over the weekend in Kalamazoo. Dalton, now accused of randomly killing six people, is believed to be a “caring” man.

Andrew Jamieson was the best man at Dalton’s wedding. He found it “unbelievable” to find what Dalton had done. The alleged killer made the first court appearance on Monday. According to police, it was random shooting by the Uber driver.

According to Jamieson, Dalton is not someone who would never cause trouble to anybody. “He was very cautious of what he did — thought things out thoroughly,” Wood TV quoted Jamieson as talking to 24 Hour News 8. With Jamieson’s claim, one may wonder if Dalton’s act on Saturday was “planned.”

Dalton’s best man is now considering visiting the accused in jail. “What was he thinking? What possessed him… to do what he did,” Jamieson wondered. Despite saying that, he believes Dalton deserves punishment.

“I’m sorry for his family to say that, but I feel much worse for the families that lost their loved ones,” Jamieson said. “I don’t really think there’s much justice for that to the people that were taken away.”

Meanwhile, Uber has defended its safety standards. It earlier said Dalton cleared a background check. It’s been less than a month for him as an Uber driver, as he was approved on January 25.

Uber Security Chief Joe Sullivan said the company had no reason to believe there was anything wrong with the driver with 4.73-star (out of five) rating. “No background check would have flagged and anticipated this situation,” the Washington Post quoted him as saying.

This is not the first time an Uber driver is involved in a controversy. Shiv Kumar Yadav, an Indian driver, was sentenced life imprisonment in November 2015. Yadav was found guilty of raping a 26-year-old female passenger, according to the BBC.