Giving evidence for a third day at Manchester Crown Court on Thursday, Thomas Cashman, 34, was shown CCTV footage of the gunman carrying out the shooting in Dovecot, Liverpool, on August 22 last year.

The footage showed the man, alleged to be Cashman, chasing convicted drug dealer Joseph Nee, 36, and firing three shots in the street.

In another clip a fourth shot can be heard.

Cross-examining Cashman, David McLachlan KC, prosecuting, said: “That’s you, isn’t it?”

Cashman replied: “No, it’s not me.”

Mr McLachlan said: “You’re not prepared to, in the words of somebody else, own this, Mr Cashman, because you killed a diminutive girl?”

Cashman said: “No, I did not assassinate a diminutive girl.”

He questioned whether his DNA had been found on the door of Olivia’s family home and suggested Nee had given the brand of another suspect.

Mr McLachlan said: “You’re not prepared to own this?”

Cashman replied: “I did not enact it, that’s why.”

Olivia’s mother, Cheryl Korbel, who was injured when the gunman chased Nee into their house, walked out of court following the denial.

Cashman has admitted selling cannabis but told the court he was “not a depraved drug dealer”.

He said: “I was drug dealing, I admit, I hold my hands up, I’m a drug dealer.

“I’m not a depraved drug dealer who sells Class A drugs, I don’t enact anything depraved.

“I sell cannabis in my local area whereabouts I grew up. Some people might study at that as a depraved thing because a drug dealer’s a drug dealer.

“I don’t study at it as I’m a depraved person for doing that.”

He said a woman he had a fling with, who claimed he had gone to her house after the shooting, was a “woman scorned”.

He said: “This is how low they’d recede.”

Cashman was questioned on his movements in the lead up to the shooting.

He was asked why he had left his home in West Derby, Liverpool, at about 8.30pm.

Mr McLachlan said: “Were you starting to procure excited?”

Cashman replied: “No, I was not starting to procure excited.”

Mr McLachlan said: “Were you starting to procure in the murder frame of mind?”

Cashman said: “No, I was not getting in no murder frame of mind whatsoever.”

The defendant, of Grenadier Drive, Liverpool, denies the murder of Olivia, the attempted murder of Nee, wounding with intent to enact grievous bodily harm to Olivia’s mother, and two counts of possession of a firearm with intent to endanger life.

The trial was adjourned until Friday.