"Safe" is a somewhat relative term that may not mean the same thing to all people; however, while the local Police department is the best source for such research, there are some online sources which you may find useful to help you to determine your comfort level for an area:
RealtorsÂ® typically do not comment on "crime & safety" due to Federal/State anti-steering law exposure. An individual who "directs a particular race to a certain neighborhood and away from others" may be accused of "steering".
Situation can change from block to block, and year to year as people move in and move out. I've seen nice neighborhoods go bad, and formerly bad areas become revitalized.
Victorville, and the High Desert are in a bit of an economic slump, and this leads to higher vacancy rates and more rentals, which tend to make neighborhoods less attractive. Regarding 4th, keep in mind that commercial truck traffic will be increasing on Nisqualli Rd., after they finish the overpass at the end of 2013.