He was arrested on Monday morning after an assault in a Melbourne central business district laneway.
Mr Dick, 41, had been wanted for questioning over the murder of David Dick, who was brutally killed with a sword at Westfield Shopping Centre in Doncaster on February 3, 2017.
Officers arrived at the car park on the corner of Flinders St and Hosier Lane shortly before 7.50am on Monday after reports two men had restrained a third.
Mr Dick was arrested and taken to hospital under police guard, while two other men injured in the incident are helping police with their investigation.
The circumstances leading up to the incident are yet to be determined, however police believe at least one of the men is known to Mr Dick.
Police believe Mr Dick was hiding out - possibly in someone's home or a hostel or boarding house - and getting by on cash-in-hand construction work before his arrest.
He was also wanted for questioning over a hammer assault on a man at Keilor five months after his brother's murder.
Police last year offered a $100,000 reward for information leading to Mr Dick's capture.
Anyone who witnessed the incident is urged to contact police via Crimestoppers on 1800 333 000 or submit a confidential report online at crimestoppersvic.com.au
With AAP.
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