Police have completed 94 lines of enquiry into the deaths of Dean and Charlie Lowe, with another 27 being pursued.
The father and son were killed after being hit by a vehicle that didn't stop on Rue de Fauvic on the evening of 5 August.
Nine officers are running the investigation, dubbed Operation Doric, and have also taken 88 witness statements, and visited 69 different locations in the area in Grouville to gather CCTV footage.
The morning after the incident a white van with 'substantial' front end damage was found in St Helier.
A 28-year-old man was arrested on suspicion of causing death by dangerous driving and failing to stop and report an RTC.
He's been released on police bail under 'strict conditions'.
The family of 48 year old Dean, who worked for the Jersey Employment Trust, and 11 year old st Clement's school pupil Charlie continue to be supported by specialist family liaison officers.
Investigators have repeated their appeal for any information that could help their enquiries.
"Anyone with any information that could assist the investigation is asked to contact police on 01534 612612 or the independent charity Crimestoppers anonymously on 0800 555 111 or via their anonymous online form at Crimestoppers-uk.org."
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