Judging from the current judicial situation, the police involved in the case can also be suspected of committing crimes, so they cannot be criminally detained. Only those who meet the provisions of Article 80 of the Criminal Procedure Law can be detained in criminal detention.

Article 80 of the Criminal Procedure Law, the public security organ may detain a flagrante delicto or a major suspect in any of the following circumstances:

(1) Being prepared to commit a crime, committing a crime or being discovered immediately after committing a crime;

(2) The victim or a witness on the spot identifies him as a criminal;

(3) criminal evidence is found around him or at his residence;

(four) attempted suicide, escape or escape after committing a crime;

(5) It is possible to destroy or forge evidence or collude with others;

(six) do not speak the real name and address, the identity is unknown;

(7) Being seriously suspected of committing crimes on the run, committing crimes for many times or committing crimes in association.