An account purporting to be former NFL star OJ Simpson tweeted "I killed her" in just its second post on Twitter .
@TheReaIOJ32 joined Twitter on Saturday morning and posted a video of Simpson claiming it to be his real account.
Just minutes later, the account followed up the initial post with one saying: "I killed her."
The account then posted "Where da b****es @" before tweeting the 'N' word.
But it was proved to be a fake account of Simpson - taking the video from a similar handle, but swapping the lower case 'l' for a capital 'I' in the word 'real'.
Simpson was famously acquitted of the murders of his ex-wife Nicole Brown Simpson and her friend, Ron Goldman in 1995.
But the families of the victims filed a civil suit against him and in 1997 they were awarded $33.5million for the duo's wrongful deaths.
Simpson was arrested again in 2007 for armed robbery and kidnapping and was sentenced to 33 years in jail the following year.
The 71-year-old was granted parole and was subsequently released from prison on 2017.
In the video posted on the Twitter account, Simpson said: "Hey Twitter, this is yours truly. I'm coming soon to Twitter. You'll get to read all my thoughts and opinions on just about everything.
"Now there's a lot of fake OJ accounts out there. So this one, @TheRealOJ32, is the only official one.
"So, this should be a lot of fun, and I have a little getting even to do. So God bless, take care."
Simpson played in the NFL for 10 years between 1969 and 1979 as a running back for the Buffalo Bills and the San Francisco 49ers.
He played in five Pro Bowl matches and was voted the NFL's MVP in 1973.
