The man accused of fatally striking Brisbane teenager Cole Miller on Sunday morning allegedly asked his mates if they wanted to "see something funny" before landing his killer blow.

Police will allege the "callous" Daniel Jermaine Lee Maxwell and his friend Armstrong Renata, both 21, were stalking the streets of Fortitude Valley with two other friends, looking for people to bash, the Courier-Mail reports.

Already charged with grievous bodily harm, prosecutors said the pair would face a new charge of unlawful striking causing death, which carries a maximum penalty of life in prison.

View photos Cole Miller died Monday after being hit in the head in Brisbane on Sunday morning. More

However earlier today the men charged over the death of Brisbane teenager Cole Miller are said to be devastated by what's occurred.

Armstrong Renata and Daniel Jermaine Lee Maxwell faced court charged with unlawful striking causing death on Tuesday, a day after the 18-year-old's life support was switched off.

Maxwell's lawyer Michael Bosscher said his 21-year-old client was "doing it tough".

"He's devastated by what's occurred," Mr Bosscher told reporters outside court.

"He feels nothing but the greatest sympathy for the family of the victim. He's only a young man himself. It was his birthday on the evening in question."

"He has no friends or family really here in Australia - they're all in New Zealand."

Renata's lawyer Neil Lawler said his client, also 21, had never been in custody before and was stressed and anxious.

"I think it's safe to say it's a tragedy for all concerned," Mr Lawler said.





They accused already attacked three people and tried to assault another when they came upon 18-year-old Cole and his friend Nick Pace and struck again, police claim.

"Do you want to see something funny?" Mr Maxwell is alleged to have said before throwing the punch that knocked Cole, an aspiring water polo player, to ground face first.

View photos Cole Miller was attacked while walking with a friend in Fortitude Valley early Sunday morning. Photo: 7 News More

View photos Armstrong Renata has been charged with unlawful striking causing death, after the alleged one-punch killing of Cole Miller. Source: Facebook. More

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