Forensic and technical examinations were carried out at the Wickham Street apartment and extended to a second flat on Upper Gerald Griffin Street.
It is understood that a possible murder weapon was recovered during the weekend.
Mr. Purcell was not known to gardaรญ and was last seen in the Wickham Street area on Wednesday September 28, two days before he was found dead.
A 32-year-old man was arrested on Sunday afternoon inย connection to the murder.
He is being detained at Henry Street Garda Station under Section 4 of the Criminal Justice Act.
Superintendent Frank O’Brien told a press briefing that Mr. Purcell was a very well liked member of the community.
“He comes from a very well known family in Limerick and worked all his life.
“Unfortunately, in recent years he suffered a degree of disability, which prevented him from carrying out a full-time job, but he was very well liked in the area”.
The victim is survived by his son Barry and daughter Amy, sisters Angela and Susan and brother Barry.