The phrase "and has since stated" is correct and usable in written English.
It can be used to indicate that someone has made a statement after a certain point in time, often following an event or action.
Example: "The company announced its new policy last month, and has since stated that it will be implemented by the end of the year."
Alternatives: "and has subsequently declared" or "and has since expressed".
Cross was later determined to be holding a cell phone at the time and the Independent Police Review Authority has since stated no weapon was ever recovered at the scene.
My constituents are still debating on what they want me to ask you to do, but that being said, the cleaning up process has been a disgrace and the claims process has been dismal... .. Of course the comments were extreme and Cao has since stated that they were meant only to convey his level of frustration with BP, but dayum!
The other, Hillcrest Park, was used as a curling competition facility and has since been converted into a state-of-the-art aquatic centre.
Following the series of tweets announcing the name and album artwork, Hebden has since stated that "very few people have heard my new album but my mother and father tell me it's some of my best music so far".
And though, the rapper has since stated that he didn't receive an invite to Marquise's prestigious ceremony, earlier this week the mother of the 17-year-old, Shaniqua Tompkins stopped by Atlanta radio station V-103 during an appearance on "The Ryan Cameron Show," where she refuted 50's claim.
Wells flew to Arizona and shook hands with Colangelo, who has since stated angrily that he never before had a player go back on a verbal agreement.
After nearly two decades of acrimony, Pink Floyd reunited with Waters in 2005 for a performance at the global awareness event Live 8, but Gilmour and Waters have since stated they have no plans to reunite as a band again.
Despite only two songs from the album being written solely by Lynott, and other members of the band contributing more to the compositions, both Gorham and Wharton have since stated their dissatisfaction with some of the songs, such as "Angel of Death", "Fats" and "Mexican Blood".
It was stated in 1919 that only twelve persons in the world understood the Einstein theory, and it has since been stated that none of the twelve could grasp any of the popular explanations of it.
