Mariah Carey wayward sister is facing a $2 million lawsuit after the singer's older sibling 'nearly killed' a truck driver while allegedly drunk driving on the wrong side of the road, DailyMail.com can reveal.  

Alison Carey, 55, has been accused of causing an accident that left Long Island resident Joe Criscione permanently 'lame and disabled' in March 2014, court documents claim.

The older Carey, who has struggled with drug addiction and prostitution, was driving erratically along the County Rd 39 - a two-lane highway - in Southampton, New York around 6 am., according to the police report obtained by DailMail.com.

Carey failed to 'keep her motor vehicle on her own side of the roadway...negligently and carelessly crossing over into the portion of the roadway on which the plaintiff was operating his vehicle,' documents state. The collision resulted in 'serious injuries' for Criscione, who claims he was forced to quit work temporarily for a year and eventually had to retire early because of his injuries. He is now looking for $2 million in compensation. 

In a police report documented that morning, Carey told authorities she was 'not sure what happened.' She responded to the lawsuit claiming she has 'no knowledge or information sufficient enough to form a belief' as to the allegations against her.

In fact, Carey's attorney argued she acted in self-defense as she was 'suddenly confronted with, and was called upon to act in, an emergency situation not created by [her] own acts. 

Criscione has alleged Carey was driving drunk, however no DUI charges were ever filed.  

In an exclusive interview, his wife Lauri spoke about the traumatic event, claiming Carey was driving at high speed on the wrong side of the road and totaled her husband's truck and left him a virtual invalid.

'My husband was heading out to work, he worked for the town of East Hampton as a heavy equipment driver and had been a commercial driver for over 20 years, it was his first accident, he's a pretty good driver,' she says. 'It was lightly raining before she [Alison Carey] came into his lane and hit him, one witness was on the phone calling the cops, as before she took him out, she nearly took out a bunch of other people. 

'So she goes over to my husband's lane, he goes into the other lane to get out of the way, she then realizes, I guess, where she is, the wrong side of the road, and turns the car, and hits him head on. It totals a 14,000lb truck.'

Alison – who is eight years older than Mariah – has been rumored to be on the brink of homelessness, broke, working as a prostitute, and suffering from many health complications including HIV.