Just adding some perspective from someone who has been inside the trunk of a
lot of cop cars over the years[1]:
A good many cops (maybe not >50%, but a very significant percentage) carry a pretty decent ad-hoc toolkit in their vehicles. There's often a toolbox with screwdrivers, socketry, pliers, some wrenches, maybe a hammer and/or other basic handtools.
It's pretty common for folks who know how to use tools to keep some on-hand, and cops are not an exception.
[1]: Yeah, so... I should probably explain that part. Some of my work involves 2-way radios, and some of that 2-way radio business has lead to me putting radios and stuff into things like cop cars. I've emptied out hundreds of cop cars to get access to what I need, and have certainly climbed into the trunk of dozens of them to be where I need to be. (Someone has to do it, and sometimes that person is me.)