The main lieutenant Andrew Brady confirmed on Saturday that the shooter was not random.
"Victory Crime scene scenes by analysts and specialists and murderers have taken part in the scene, and the scene has been processed and has been removed from the exhibits that are being explored," he said.
"There is no evidence to suggest that it was random."
The police spokesman confirmed that they had found two weapons in the park.
"However, for a number of reasons, we do not provide comments on active research, but it is not safe," he said.
He told a man who wanted to remain anonymous Aroa A boy found guns.
"A five-year-old boy came up and told his mother the leaves next to the church on the eastern edge of the Fawkner park," he said.
"When they looked at their parents, they found a gun.
"The police were called and linked to the surrounding area".
Brady's main boss was not told that the death of a man was linked to another recent Melbourne shoot.
"This crime weapon is happening in a public place, being Fawkner Park on Friday night," he said.
"Our regular member of police has been in Fawkner Park all day long, today and afternoon and afternoon, and they will remain calm throughout the weekend, and they will also take care of the residents of Fawkner Park to ensure that the Victoria Police is committed to public safety."
On Saturday afternoon Fawkner Park was once again busy with riders and a woman said: "It's nice to go back to our park."
The police want to talk to anyone who has seen or heard something suspicious about 7:30 a.m. to 8:00 p.m. on Friday.
They are also looking for a camera camera or any CCTV.
Anyone with information should call Krimena Stoppers at 1800 333,000.
Goya Dmytryshchak is The Age Reporter.