Best Investigation movies of 1990

Actors : Mike Abbott, Marko Ritchie, Marcus Egan, Peter Cressall,
Directors : Godfrey Ho,

US federal agents call on a group of Ninjas to help them solve the dreadful murders of a bunch of young prostitutes.

Actors : Todd Jacobsen, Scott Allen Nollen,
Directors : Scott Allen Nollen,

Sherlock Holmes, his son, Steel Rod Holmes, and Dr. John H. Watson investigate the disappearance of an antique divan, believed to be part of a drug-smuggling ring led by the nefarious "...

Actors : Gang Wu, Shuang Zhen, Lei Zhu, Fei Yu,
Directors : Hongsheng Zhuang,

Chinese detectives investigate an international crime ring.

Actors : Richard Harrison, Christopher Barkett, Steve Barkett, Tera Hendrickson,
Directors : Steve Barkett,

A private detective searching for a killer comes across a satanic cult from another dimension, monsters called up from hell and murderous ninja assassins.

Actors : Gabriela, Paula Hendricks, Paula Gallagher, Rik Billock,
Directors : Hugh Gallagher,

Tara, a psychotic call girl, has a strange obsession with giving men the ultimate climax. Chase is a detective out to stop her killing spree.

Actors : Yeo-jeong Yoon, Kil-su Hyeon,
Directors : Ki-young Kim,

Two women plan the perfect murders of their husbands whom have betrayed them.