That kinda looks like them, except I don't think they had suspension forks. I was unable to view the game. NFL Network was re-airing a bunch of games. I wonder if the trunk(s) had indication that if they were 'police' or 'paramedic'. I couldn't see it from the side view. I know Jandd makes those bags.
Paramedics carry a large amount of material with them on the job, so I can easily see that this may be what you saw. Aside from their utility-belts, what would a cop be carrying? An inflatable jail-cell?