Jamie Spears files petition to investigate Britney Spears’ guardianship treatment

Jamie Spears filed a petition on Tuesday to investigate allegations by his daughter Britney Spears during her rare testimony last week asking to end her guardianship. The singer, 39, has been under legal guardianship involving her father for more than 13 years. In dramatic testimony last Wednesday, Spears claimed she was continuously overworked, took lithium …