In California, lawsuits for personal in juries must be filed within 2 years from the date of the injury [unless person agreed to pay you]. So it appears you are too late to sue.? If you get him to promise to pay you something [get it in writing if you can], then you could sue for breach of contract with the damages being what he promised to pay.
Answered on Nov 02nd, 2017 at 12:17 PM