As someone who has been taking reports of things stolen from lockers at gyms and from vehicles at gym parking lots for 22 years, I can tell you if you leave anything of value in your car or a locker at a gym, it is only a matter of time before you are what we in the biz refer to as "victim".
When I go to the gym my gun, wallet, phone, etc are in a little "man bag" I carry with me and set between my feet while on the equipment. Only thing in the locker is clothing. After having a vehicle break in where they missed the gun, I decided never to leave one in the car agin if there was any other option available.
On another note, while Lynnwood certainly will never be confused with say, White Center or Skyway, it still has plenty of crime. Maybe not murders, but realistically few people are at risk for that given that most (90+%) of murder victims have a relationship with their killer and it is not random.
a little time with google and you will see a fair amount of assaults, robberies, and larcenies (not to mention rapes) happen in the little Mayberry you call Lynnwood. On the bright side, crime there has been trending down over the past eight years or so.