On February 20, 45-year-old Jason Dalton shot and killed six people in Kalamazoo, Michigan, while working part time as an Uber driver. The recent tragedy has people questioning the safety of the Uber cab service and the effectiveness of the company’s background checks.

According to CNN, Dalton’s motive for killing the pedestrians is unclear. He first shot and critically wounded a mother of three while she was standing outside of her apartment complex. He then opened fire on a car dealership later that day killing an 18-year-old and his father. He opened fire on a Cracker Barrel not 15 minutes later, killing four more people and critically wounding another. Passengers who rode with Dalton that day between the murders claimed his driving was dangerous and chaotic. Dalton has admitted to the charges, but currently wants to remain silent.

The incident in Michigan is not the first of its kind. Over the years, numerous accounts of Uber drivers committing physical and sexual assault, theft, manslaughter and kidnapping have been recorded. The company is always quick to offer their condolences to families and loved ones for the tragedies, but never takes responsibility for the actions of its drivers.

Uber’s background checks have been questioned long before the Dalton incident. According to Forbes, California prosecutors filed against Uber in 2014, claiming that the company’s background checks were misleading. Prosecutors discovered that Uber limits how far back its background checks look, allowing certain crimes to go unnoticed on the applicant’s criminal records. Many criminals pass the background check by applying under a different name — that of a sibling or friend. This fact led prosecutors to believe that fingerprint-based checks would be a safer method of hiring. Uber disagrees and still uses name-based background checks.

In addition to refusing to use fingerprint background checks, Uber is also choosing not to address the idea of placing “panic buttons” into vehicles. The company’s chief security officer, Joe Sullivan, says that Uber couldn’t have done anything to stop this recent tragedy.

“There were no red flags, if you will, that we could anticipate things like this,” said Sullivan to CNBC.

If Uber had improved their background checks back in 2014, the Dalton massacre could have been avoided. The company’s lack of responsibility for the actions of their drivers puts the public at risk. If a change does not occur, it is only a matter of time before some one else gets hurt.