What If $...?$

You are an officer assigned to patrol on the day watch in a large city. You have been dispatched to a local elementary school to a suspected missing child case with a possible suspect in custody.

The suspect has not confessed, but has made incriminating statements implicating himself in the suspected crime.

What are the first steps you must take?

What is the probable cause you must articulate in order to obtain a search warrant?

$-$What are the elements you must have in your search warrant?

What additional resources will you need and how will you request them?

$-$What must be done with the suspect?