Rapid deceleration

2017 Citroen C4 Picasso
Car: Citroen C4
Year: 2017
Variant: Picasso
Categories: Running Rough, Starting & Power Loss
I was driving in normal conditions on a fairly clear motorway when my car seemed to kind of lock, there was a bang and rapid deceleration which resulted in the car behind smashing into my rear. The police seized my car for examination but released it 2 weeks later with the single comment "There were no defects". I am now subject to an ongoing police investigation but from my point of view, the car just locked.
I would just add that when I first had the car (with only about 4,000 on the clock), I had to have the entire wiring loom replaced.
Any thoughts, please?
Problem added: Mar 8, 2021 (3 years ago)
I have spent a lifetime in the motor trade and never heard of that occurring . Having had friends in a major Police garage I can assure you it would have been thoroughly examined prior to conclusions issued ,
Answered Mar 8, 2021 (3 years ago)

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