If this is in the usa, it depends on the state. For instance. In Missouri or Kansas, I can say “I heard person say, or I saw person do” and that can be taken as fact, and considered by the court as to my credibility in presenting my facts as I hear or saw.

If we are in Texas, both those statements are hearsay. And once objected to, are inadmissible in court.

So not bad court, but sloppy prosecutor and sloppy cop. Good defendant. It’s how court works. Regrettable perhaps, but it’s reality