My car won't keep a charge. Bought new battery, but now car won't start at all on 1999 Infiniti G20

Bedn at the repair shop over a week now, they say its asecurity issue

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
have they ck'd it for a voltage draw?do they have alarm codes?