Unable to get all rows from csv based on some column value [duplicate]

I am confused about how to get all the matching some value, I went through to all the related post on such topic on stackoverflow, what I have right now should be working, I am unsure either this csv is corupted, or am I making some mistake, so far I have this:

Data Sample

Now if I try to get the rows based on School Name, it works:

df_masterdb[df_masterdb['School Name'] == "Daniel Pratt Elementary School"]

But if I try to get rows based on State_abrr, it fetches me nothing:

df_masterdb[df_masterdb['State_abrr'] == "AL"]

Every column is working as expcted and fetches me all the required rows by above method but this "State_abrr" column fetches me nothing. Am I missing something here?