Student high on cocaine and amphetamines crashes into river and drowns after police pulled her over and let her go

A woman who died while driving home from work while high on cocaine and amphetamines was pulled over hours before she drove into a river but a sobriety test was never ordered.

Toni Anderson, 20, drove into the Missouri River and drowned on January 15.

Her body and submerged car were recovered in March.

Video from a police car's dashboard camera has painted a picture of Ms Anderson's mental capacity in the hours before her death, with the police officer telling her she was "heading the wrong" way down a two-way street and "into oncoming traffic."

The police officer questioned Anderson on whether she had been drinking, to which re responded that she had not.

She was heard giggling, but the police officer told her it was "not funny".

"That is why I'm asking you if you have been drinking," he said.

"Are you taking any medications or anything?"

"No, I am just really sick. I don't feel good," Anderson said.

Despite her behaviour, the police officer did not order a roadside sobriety test.

"Toni, do me a favour pull into that parking lot; sit there a while, gather yourself," the police officer told her.

"Because you're nowhere near.... and you're facing the wrong direction. So pull over there and gather yourself. Alright?"

Anderson then pulled over at a police station where she sent a friend a text message, which read: "Omg just just pulled over again".

This was the last message the college student ever sent.

She left her job at an adult entertainment venue, was pulled over by police, drove off the road, into the Missouri River and drowned.

A toxicology report found ethanol (alcohol), cocaine and amphetamines in her system at the time of her death.

No disciplinary action has been taken against the police officer, but a friend of Anderson's believes "he should be punished for the fullest extent for letting her go."

"Cops don't tell people they think are intoxicated to go collect themselves," Mary Gillespie told the Kansas City Star.

"No, they are going to perform a Breathalyser test or other DUI testing and then determine if they need to take you in or not."