That is definitely a subjective question that no Realtor can answer simply because legally that would be imposing my/our values on another. That said I do respect a Mom's concern and my suggestion to you, as to anyone who has asked me this type of question over the years, is to call the police station. There is a community liaison officer who you could speak with to get more information. Jones' Hill also has a pretty tight neighborhood association and you can probably find some info on line. The Dorchester Reporter also has a link to crime statistics and will give you a visual as to what has gone on over the past month or so.
Hope this helps. Let me know if you need anything else.
Jessie Cuddy, Realtor
Boston Bayside Properties
2253a Dorchester Avenue
Dorchester, MA 02124