NORTHFIELD TOWNSHIP, Mich. -

Transmissions between a 19-year-old pilot and an airport control tower point to his small plane being too heavy before it crashed after takeoff northwest of Detroit.

The pilot can be heard on liveatc.net saying "we're a little over weight ... we're going to have to come back and land" before the Cessna 172 crashed Friday at Oakland County International Airport in Waterford. Federal Aviation Administration spokesman Lynn Lunsford confirms that the recording is an archive of the tower conversation. All four people aboard were killed.

The pilot was 19-year-old Troy Brothers.

--Troy Brothers

The other victims were Brother's 53-year-old mother Sandra Haley and 58-year-old stepfather James Haley.

--Sandra Haley

The fourth victim was Jamie Jose a firefighter in Northfield Township

--Jamie Jose

Northfield Township Public Safety and Fire Chief William Wagner said in a release Saturday that 34-year-old father of three had been with the department for about a year-and-a-half. A memorial fund for Jose is being created at PNC Bank in Whitmore Lake.

More: What when wrong before Oakland County plane crash?

An airport spokesman says the pilot reached an altitude of about 100 feet before requesting to return.