The victim's family are still seeking help in identifying those involved in the incident.
Rescue and relief efforts are currently underway, but landslides and damage to roads are causing delays.
"I find it implausible that there could have been some ex-post collusion by hundreds of people," Prof Lim said.
The arrest was made on 15 Aug, a day after a video of the incident went viral on Threads.
President Tharman also posted on Facebook after the match to wish the Lions well for the second leg.
She initially suspected the elderly man of being a thief trying to steal their belongings from a park bench.
Other opening promos include limited-edition LE SSERAFIM freebies and a free photo booth experience.
"You can say they warmed the cockles of my heart," Jamus Lim wrote about laksa.
The incident caused the uncle to suffer severe back pain, his family said.
Since each container carries a refundable deposit of S$0.10, about S$550,000 has been refunded to date.