To avoid jarring the focus of the reader, the POV should be maintained through the entire chapter. Critiquers of Marked Target have stated that there's much more of a personal and realistic feel to the entire tale, and that the POV of Joe Hood, Adrian and others stayed in the third person - it really solidified the changing character perspectives.
Of course, mixing POVs has its fair share of detractors as I discovered during the query process for Marked Target with various literary agents.
Well-known authors such as Nelson DeMille, in The Lion’s Game, used it – 1st person POV for John Corey and 3rd person for his antagonist, Khalil, to what I believe to be extraordinary effectiveness. It gave the reader a sense of intimacy with Corey while holding Khalil at arm’s length.
Stephen King used this 1st and 3rd POV technique quite effectively in Christine. Lisa Gardner used the POV mix technique seamlessly in her many novels, including Right Behind Her and Find Her. Add James Lee Burke with his Robicheaux novels and you have a plethora of well-known authors who have used this technique very effectively.
Whether you use 1st, 3rd, or a mix, each POV character will be more fully developed and becomes the main character of their own story. The novel then becomes more of an anthology-like collection of stories that share a common, overall saga.