The quads were used to help remove pellets which spilled onto Camber Sands in East Sussex last year.
Taylor Mitten, 23, fatally stabbed his brother Jack, 25, in Worthing in September 2025.
A woman is appealing against immunity for prosecutors who wrongly share sensitive details in court.
Michael Pyke will be sentenced at Lewes Crown Court on 13 November after pleading guilty.
The parcels contained clothes with a value of about £500, Sussex Police say.
Officers tell the BBC they are overstretched and struggling to keep up with sophisticated criminals.
The vehicle overturned near Angmering in the early hours, causing delays.
Police say they have taken a man from Crowborough into custody.
The man, in his 40s, was stabbed at Portslade railway station shortly before 19.20 BST on Thursday.
